NC20.0.0.9 breaks sync to android-app

[AndyFx12]

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Steps to reproduce

1. Install NC20.0.0.9 on server (updated step-by-step from NC19)
2. try to sync with Android-App

Expected behaviour

• App should fetch current file-list on server

Actual behaviour

• filelist keeps empty
• error-message on Server
• alternative app "oCloud for owncloud" works fine
• desktop-clients work fine, too
  I reported this issue on android-issue-tracker, too. Could be a problem of the app itself.
  NC20.0.0.9 server breaks Android-App-Sync android#7071

Environment data

Android version: 10 (but same on different devices with Android > 8)

Device model: Moto G8Plus

Stock or customized system: Stock

Nextcloud app version: 3.13.1 beta

Nextcloud server version: NC20.0.0.9

Reverse proxy: no

Logs

Web server error log

cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:53:25 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:53:51 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6202 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:53:51 +0200] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 304 5410 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:53:56 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:53:45 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:08 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:54:08 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6190 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:54:10 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 304 314 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:54:23 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6202 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:54:23 +0200] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 304 5410 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:05 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:26 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:38 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:54:38 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6190 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:42 +0200] "PUT /apps/user_status/heartbeat HTTP/1.1" 204 765 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:42 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status HTTP/1.1" 200 1029 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:25 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:54:55 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6202 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:54:55 +0200] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 304 5410 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:56 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:54:45 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:55:08 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6190 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:08 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:18 +0200] "GET /index.php/204 HTTP/1.1" 204 6425 "-" "Mozilla/5.0 (Android) Nextcloud-android/3.13.1"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:19 +0200] "GET /index.php/204 HTTP/1.1" 204 6421 "-" "Mozilla/5.0 (Android) Nextcloud-android/3.13.1"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:23 +0200] "GET /index.php/204 HTTP/1.1" 204 6411 "-" "Mozilla/5.0 (Android) Nextcloud-android/3.13.1"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:05 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:26 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:55:27 +0200] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 304 5410 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:55:27 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6202 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:38 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:55:38 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6190 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:26 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:56 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:55:59 +0200] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 304 5410 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:55:59 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6202 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:55:46 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:56:08 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 5408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - ncadmin [10/Oct/2020:09:56:08 +0200] "PROPFIND /remote.php/dav/files/ncadmin/ HTTP/1.1" 207 6190 "-" "Mozilla/5.0 (Windows) mirall/3.0.2stable-Win64 (build 20200924) (Nextcloud)"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:56:24 +0200] "PUT /apps/user_status/heartbeat HTTP/1.1" 204 5859 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:56:25 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status HTTP/1.1" 200 1029 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:56:06 +0200] "GET /apps/logreader/poll?lastReqId=DyaIn9FGFGNEN9aQGQXP HTTP/1.1" 200 870 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"
cloud.s-t-franz.de:443 192.168.1.250 - - [10/Oct/2020:09:56:26 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 314 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0"

Nextcloud log (data/nextcloud.log)

{"reqId":"Q91lCwuxZ8dlCB43VcUE","level":4,"time":"2020-10-10T09:10:39+02:00","remoteAddr":"192.168.1.250","user":"16BF35C3-389B-4264-AAC9-A636C2EFE005","app":"webdav","method":"PROPFIND","url":"/remote.php/webdav/Upload/","message":{"Exception":"TypeError","Message":"Argument 1 passed to OC\\Group\\Manager::getUserGroupIds() must implement interface OCP\\IUser, null given, called in /var/www/nextcloud/lib/private/Share20/DefaultShareProvider.php on line 884","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/Share20/DefaultShareProvider.php","line":884,"function":"getUserGroupIds","class":"OC\\Group\\Manager","type":"->","args":[null]},{"file":"/var/www/nextcloud/lib/private/Share20/Manager.php","line":1333,"function":"getSharedWith","class":"OC\\Share20\\DefaultShareProvider","type":"->","args":["andreas.franz",1,{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"},-1,0]},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/Node.php","line":323,"function":"getSharedWith","class":"OC\\Share20\\Manager","type":"->","args":["andreas.franz",1,{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"},-1]},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/FilesPlugin.php","line":372,"function":"getNoteFromShare","class":"OCA\\DAV\\Connector\\Sabre\\Node","type":"->","args":["andreas.franz"]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/PropFind.php","line":96,"function":"OCA\\DAV\\Connector\\Sabre\\{closure}","class":"OCA\\DAV\\Connector\\Sabre\\FilesPlugin","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/FilesPlugin.php","line":374,"function":"handle","class":"Sabre\\DAV\\PropFind","type":"->","args":["{http://nextcloud.org/ns}note",{"__class__":"Closure"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"handleGetProperties","class":"OCA\\DAV\\Connector\\Sabre\\FilesPlugin","type":"->","args":[{"__class__":"Sabre\\DAV\\PropFind"},{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1063,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["propFind",[{"__class__":"Sabre\\DAV\\PropFind"},{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"}]]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":989,"function":"getPropertiesByNode","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\DAV\\PropFind"},{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1678,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->","args":["Upload",["{http://owncloud.org/ns}comments-unread","{http://owncloud.org/ns}owner-id","{http://nextcloud.org/ns}has-preview","{http://nextcloud.org/ns}sharees","{DAV:}getlastmodified","{http://owncloud.org/ns}size","{http://nextcloud.org/ns}note","{DAV:}getcontentlength","{DAV:}displayname","{http://nextcloud.org/ns}mount-type","{http://nextcloud.org/ns}rich-workspace","{DAV:}resourcetype","{http://owncloud.org/ns}favorite","{http://nextcloud.org/ns}is-encrypted","{DAV:}creationdate","{http://owncloud.org/ns}id","{http://owncloud.org/ns}owner-display-name","{DAV:}getetag","{http://owncloud.org/ns}permissions","{DAV:}getcontenttype"],1]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1661,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->","args":[{"elementMap":[],"contextUri":"/remote.php/webdav/","namespaceMap":{"DAV:":"d","http://sabredav.org/ns":"s","http://owncloud.org/ns":"oc","http://nextcloud.org/ns":"nc"},"classMap":[],"__class__":"Sabre\\Xml\\Writer"},{"__class__":"Generator"},false]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":363,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Generator"},false]},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":474,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["method:PROPFIND",[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":251,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":319,"function":"start","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/var/www/nextcloud/apps/dav/appinfo/v1/webdav.php","line":84,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/var/www/nextcloud/remote.php","line":167,"args":["/var/www/nextcloud/apps/dav/appinfo/v1/webdav.php"],"function":"require_once"}],"File":"/var/www/nextcloud/lib/private/Group/Manager.php","Line":325,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.13.1","version":"20.0.0.9"}
{"reqId":"j0rIFMVgjwYIDJJKA2Hc","level":4,"time":"2020-10-10T09:10:46+02:00","remoteAddr":"192.168.1.250","user":"16BF35C3-389B-4264-AAC9-A636C2EFE005","app":"webdav","method":"PROPFIND","url":"/remote.php/webdav/Upload/","message":{"Exception":"TypeError","Message":"Argument 1 passed to OC\\Group\\Manager::getUserGroupIds() must implement interface OCP\\IUser, null given, called in /var/www/nextcloud/lib/private/Share20/DefaultShareProvider.php on line 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***"]},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/FilesPlugin.php","line":374,"function":"handle","class":"Sabre\\DAV\\PropFind","type":"->","args":["{http://nextcloud.org/ns}note",{"__class__":"Closure"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"handleGetProperties","class":"OCA\\DAV\\Connector\\Sabre\\FilesPlugin","type":"->","args":[{"__class__":"Sabre\\DAV\\PropFind"},{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1063,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["propFind",[{"__class__":"Sabre\\DAV\\PropFind"},{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"}]]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":989,"function":"getPropertiesByNode","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\DAV\\PropFind"},{"__class__":"OCA\\DAV\\Connector\\Sabre\\Directory"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1678,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->","args":["",["{http://owncloud.org/ns}comments-unread","{http://owncloud.org/ns}owner-id","{http://nextcloud.org/ns}has-preview","{http://nextcloud.org/ns}sharees","{DAV:}getlastmodified","{http://owncloud.org/ns}size","{http://nextcloud.org/ns}note","{DAV:}getcontentlength","{DAV:}displayname","{http://nextcloud.org/ns}mount-type","{http://nextcloud.org/ns}rich-workspace","{DAV:}resourcetype","{http://owncloud.org/ns}favorite","{http://nextcloud.org/ns}is-encrypted","{DAV:}creationdate","{http://owncloud.org/ns}id","{http://owncloud.org/ns}owner-display-name","{DAV:}getetag","{http://owncloud.org/ns}permissions","{DAV:}getcontenttype"],1]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1661,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->","args":[{"elementMap":[],"contextUri":"/remote.php/webdav/","namespaceMap":{"DAV:":"d","http://sabredav.org/ns":"s","http://owncloud.org/ns":"oc","http://nextcloud.org/ns":"nc"},"classMap":[],"__class__":"Sabre\\Xml\\Writer"},{"__class__":"Generator"},false]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":363,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Generator"},false]},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":474,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["method:PROPFIND",[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":251,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":319,"function":"start","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/var/www/nextcloud/apps/dav/appinfo/v1/webdav.php","line":84,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/var/www/nextcloud/remote.php","line":167,"args":["/var/www/nextcloud/apps/dav/appinfo/v1/webdav.php"],"function":"require_once"}],"File":"/var/www/nextcloud/lib/private/Group/Manager.php","Line":325,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.13.1","version":"20.0.0.9"}

NOTE: Be super sure to remove sensitive data like passwords, note that everybody can look here! You can use the Issue Template application to prefill some of the required information: https://apps.nextcloud.com/apps/issuetemplate

[kesselb]

Thanks for reporting 👍

1. Are you using ldap?
2. Is and****.fr*** the display name for ldap account 16BF35C3-389B-4264-AAC9-A636C2EFE005?

What is happening: A note for a folder is requested and that fails. The folder is shared to you by a group. At some point a user id is used to find a user that does not exist. So the user id might be wrong. Question is why ;)

cc @icewind1991 as you changed the code recently and @blizzz as master of ldap ;)

[AndyFx12]

Hallo kesselb,

both Yes! Most folders are shared from "**admin" to different users.
**admin has no account on ldap.

And - surprisingly - oCloud-app works fine.

regards, Andy

[kesselb]

And - surprisingly - oCloud-app works fine.

oCloud as third party does not request notes stored to a file hence the failing code does not run and everything works 🙈

[GabrielJean]

Hello, I have the same issue using ldap.

[piieerre]

Hi, I have the same issue
Example error below.

Nextcloud version: 20
PHP version: 7.4
Context: Synchronizing files on an Android tablet using the Autosync application

[webdav] Fatal: TypeError: Argument 1 passed to OC\Group\Manager::getUserGroupIds() must implement interface OCP\IUser, null given, called in /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/lib/private/Share20/DefaultShareProvider.php on line 884 at <<closure>>

 0. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/lib/private/Share20/DefaultShareProvider.php line 884
    OC\Group\Manager->getUserGroupIds(null)
 1. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/lib/private/Share20/Manager.php line 1333
    OC\Share20\DefaultShareProvider->getSharedWith("v21@monapp.app", 1, OCA\DAV\Connector\Sabre\Directory {}, -1, 0)
 2. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/apps/dav/lib/Connector/Sabre/Node.php line 323
    OC\Share20\Manager->getSharedWith("v21@monapp.app", 1, OCA\DAV\Connector\Sabre\Directory {}, -1)
 3. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/apps/dav/lib/Connector/Sabre/FilesPlugin.php line 372
    OCA\DAV\Connector\Sabre\Node->getNoteFromShare("v21@monapp.app")
 4. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/PropFind.php line 96
    OCA\DAV\Connector\Sabre\FilesPlugin->OCA\DAV\Connector\Sabre\{closure}("*** sensitive parameters replaced ***")
 5. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/apps/dav/lib/Connector/Sabre/FilesPlugin.php line 374
    Sabre\DAV\PropFind->handle("{http://nextcloud.org/ns}note", Closure {})
 6. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/event/lib/WildcardEmitterTrait.php line 89
    OCA\DAV\Connector\Sabre\FilesPlugin->handleGetProperties(Sabre\DAV\PropFind {}, OCA\DAV\Connector\Sabre\Directory {})
 7. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/Server.php line 1063
    Sabre\DAV\Server->emit("propFind", [Sabre\DAV\PropF ... }])
 8. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/Server.php line 989
    Sabre\DAV\Server->getPropertiesByNode(Sabre\DAV\PropFind {}, OCA\DAV\Connector\Sabre\Directory {})
 9. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/Server.php line 1678
    Sabre\DAV\Server->getPropertiesIteratorForPath("", ["{http://ownclo ... "], 1)
10. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/Server.php line 1661
    Sabre\DAV\Server->writeMultiStatus(Sabre\Xml\Writer ... ]}, Generator {}, false)
11. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/CorePlugin.php line 363
    Sabre\DAV\Server->generateMultiStatus(Generator {}, false)
12. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/event/lib/WildcardEmitterTrait.php line 89
    Sabre\DAV\CorePlugin->httpPropFind(Sabre\HTTP\Request {}, Sabre\HTTP\Response {})
13. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/Server.php line 474
    Sabre\DAV\Server->emit("method:PROPFIND", [Sabre\HTTP\Requ ... }])
14. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/Server.php line 251
    Sabre\DAV\Server->invokeMethod(Sabre\HTTP\Request {}, Sabre\HTTP\Response {})
15. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/3rdparty/sabre/dav/lib/DAV/Server.php line 319
    Sabre\DAV\Server->start()
16. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/apps/dav/appinfo/v1/webdav.php line 84
    Sabre\DAV\Server->exec()
17. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/remote.php line 167
    require_once("/home/clients/7 ... p")

PROPFIND /remote.php/webdav/
from 78.211.39.3 by V21 at 2020-10-13T06:54:34+00:00

[samr7]

3. /home/clients/74fcbf00195459b82a98982532cd5a5c/monapp/apps/dav/lib/Connector/Sabre/FilesPlugin.php line 372
   OCA\DAV\Connector\Sabre\Node->getNoteFromShare("v21@monapp.app")

Notice stack frame 3, the DAV FilesPlugin module calling getNoteFromShare() and passing in the user login name. From examining the code, this does not appear to be correct. Instead, it would appear that it needs to be passing the "UID," which for the LDAP backend is a GUID-like thing.

Here's the code from FilesPlugin:

                    $propFind->handle(self::SHARE_NOTE, function () use ($node, $httpRequest) {
                            return $node->getNoteFromShare(
                                    $httpRequest->getRawServerValue('PHP_AUTH_USER')
                            );
                    });

There are two other places in FilesPlugin that appear to have this problem.

One way to fix it is to change the constructor of FilesPlugin to take a reference to the IUserSession object, and pull the UID out of that.

[codiflow]

You can temporary workaround this problem by searching for any letter in the search input box (e. g. e) and hit enter. Afterwards you will see all files in the app.

[lolotiti06]

Thank you very much Christian.
Indeed you can see the files which is nice, however, the "+" menu doesn't work in the root (while it is working in subfolders).
Thanks.
Laurent.