I believe this has something to do with one of the following packages (which are not from the official Ubuntu archive) you have installed on your system.
epson-inkjet-printer-escpr epson-printer-utility google-chrome-stable imagescan imagescan-plugin-gt-s650 imagescan-plugin-networkscan imagescan-plugin-ocr-engine polarr timeshift Please try removing them and attempting the upgrade again. Thanks in advance. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1888299 Title: in french pas possible de mettre à niveau 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1888299/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs