Hi John,
Any resolution to your issue?
I have 25 sites using Updraft and experience the same issue with each site. I have 25 different Google developer projects – 1 for each site – different tokens for each.
My only guess, and this is drawing at straws, is that there’s some kind of issue related to WP remembering username/passwords for Admin login and maybe writing over the Google token user/pass? Doesn’t make sense, but I can’t think of anything else.
I can re-authorize and manually do the backup and it pushes the backup off-site just fine. Seems to work fine until I login to the admin, but again, maybe that’s just the point I notice the issue.