Not able to login to bugtracker via Github

Hello, Team!

When I click on the Github icon above the login field, I get an error message (see attachment).
[GithubLoginToPythonBT](https://user-images.githubusercontent.com/1839739/129916685-8aeebe07-4323-4f70-b7e1-6821f03afa6e.gif)


Can you fix this?
This issue is linked to #99 