When creating an OAuth2 client on
and providing its credentials to a wikiDomain, clicking the GitHub login in the popup window redirects it to https://github.com/login/oauth/authorize?response_type=code&scope=user%3Aemail&client_id=af698a7850beab68841 (this particular client ID has been derigistered) and shows the GitHub 404 page.
This does not happen when providing credentials to an OAuth2 client created on