I have Just upgraded from 1.6.0 to 1.6.1 due to a problem with OAuth in an application
I have noticed that messaging provider was deleted, OAuth provider needed rebuild,
And now , on multiple app/projects , I get Error 400, General_bad_request when trying to run createOAuth2Session (with Google)
TL;DR
Developer upgraded from version 1.6.0 to 1.6.1 due to an OAuth problem in their application. After the upgrade, they encountered Error 400 (general_bad_request) when attempting to use createOAuth2Session with Google. The issue might be related to the messaging and OAuth providers needing to be rebuilt.