14 answers
I eventually resolved this error with aid from https://help.salesforce.com/articleView?id=000220146&type=1 Even though I initially did select the Drive API and created all my credentials, it appears the credentials were saved without the Drive API. Going back to Google and (re)Enabling the Drive API for the project resolved the error. Of course upon getting everything working I discovered that Team Drive files aren't viewable - just my personal Google Drive files. If you need Team Drive access consider upvoting https://success.salesforce.com/ideaView?id=0873A000000CSZSQA4