Awesome, David. Thank you!
I wish I could have parsed that from the logs. Updraft is now working again for two installs/accounts. However, the second install is still giving the warning about "infrequent visits". For this second site, the Google Drive API had been enabled from the original setup almost a year ago. This site also gets traffic 24/7 plus bot traffic and regular Pingdom visits.
Thanks for a great plugin and super support help!