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: shim-signed: Depends: grub-efi-arm64-signed (>= 1.187.2~) but it is not going to be installed Depends: grub2-common (>= 2.04-1ubuntu24) but 2.06-2ubuntu7.2 is to be installed
