I had the same problem. I didn't figure out the cause of this issue, but found a very simple solution. The credentials had expired, so I needed to go to Settings > Online Accounts and select my Google account and log in again. After a few minutes the back-up restarted automatically and finished successfully.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to deja-dup in Ubuntu. https://bugs.launchpad.net/bugs/1747646 Title: Authentication error with google drive Status in Déjà Dup: Confirmed Status in Duplicity: Confirmed Status in deja-dup package in Ubuntu: Triaged Bug description: Hi, I'm having an issue using deja-dup to back up my laptop to my google drive. When backing only a small folder (eg: ~/Documents) every thing works fine. However when trying to backup my whole home folder (/home/myusername) I get an "Invalid credentials" error after 5-10 min. The back up seems to start normally and my destination folder starts filling with "duplicity-full...difftar.gz" files, but eventually I get the Invalid Credentials error. lsb_release -d Fedora release 27 (Twenty Seven) rpm -q deja-dup duplicity deja-dup-37.1-1.fc27.x86_64 duplicity-0.7.16-1.fc27.x86_64 deja-dup.log attached. I cannot attach deja-dup.gsettings since i can only join 1 file. Will send if needed. To manage notifications about this bug go to: https://bugs.launchpad.net/deja-dup/+bug/1747646/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
