Azure AD service return code 404 without an informative error message
Frustrating issue: please see the below link.
This one bit us also with hub and upsource, please fix it MS!
The https://login.microsoftonline.com/common/oauth2/v2.0/token endpoint now always returns empty response with 404 status code for apparently valid requests.
Additionally review commentary from the third-party module developers: https://youtrack.jetbrains.com/issue/JPS-6402