we have the same problem, although we have only selected Google Drive for the backup, the backup is also stored on the hoster’s server. I will send you the logfile an would appreciate a shortterm solution for this
Here are Screenshots from the Settings in Updraft and from the latest Backup on the google drive server and the logfile.
https://www.dropbox.com/scl/fo/owfid874dq047wvcg3e7j/h?rlkey=8ew0udnkqovoi8g06nt8ancm7&dl=0
