Expected Broccoli node, got undefined with version 3.1.4

[omairrazam]

After installing the addon on Ember 3, I got this error as I restarted the Ember server after addon installation.

BroccoliMergeTrees: Expected Broccoli node, got undefined for inputNodes[0]
Stack Trace and Error Report: /var/folders/9s/kjpz6ztd7_9b1vf867k9_w7c0000gn/T/error.dump.77414cbcfd04d41f5f2f8439407054f5.log