We just upgraded to Moodle 3.3 over the weekend and Google Drive integration is no longer working.
I re-configured the repository on the new OAuth 2 services configuration page since it didn't carry over from the upgrade from 3.2.3. The drive integration was working correctly on Moodle 3.2.3 (and several previous versions of Moodle).
Now, when a user tries to connect to their Google Drive, the pop-up page just gives and error and says "Invalid action parameter" after you click the button to login to the external account. There is a "more information about this error" link on the page, but of course, it goes to a page that doesn't exist on Moodle Docs.
Any ideas? I reported it here: https://tracker.moodle.org/browse/MDL-59020 but nobody has responded yet.