I have Ubuntu 20.10. When the update message arrives, I click on install and it gives this error:”This error could be caused by required additional software packages which are missing or not installable. Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time.Transaction failed: Package dependencies cannot be resolved The following packages have unmet dependencies:grub-efi-amd64-signed: “Please tell me how to fix Ubuntu 20.10 update problem.
I guess some packages may have been deleted by mistake or files of a package have been corrupted. However, the command below should fix your packages:
sudo apt install --fix-broken
7 days a week, 24 hours a day