Thank you for taking the time to report this bug and helping to make Ubuntu better.
I see in the logs
Jan 16 01:41:14 ubuntu-mate grub-installer: Installing for x86_64-efi platform.
Jan 16 01:41:19 ubuntu-mate grub-installer: grub-install: error: cannot copy `/usr/lib/grub/x86_64-efi-signed/grubx64.efi.signed' to `/boot/efi/EFI/ubuntu/grubx64.efi': No space left on device.
Jan 16 01:41:19 ubuntu-mate grub-installer: error: Running 'grub-install --force --target x86_64-efi "/dev/sda"' failed.
Check you have room in your EFI/ESP partition for the many OSes you have installed. I've had to create a slightly larger EFI/ESP partition for some boxes I do multiple QA-test installs.
Thank you for taking the time to report this bug and helping to make Ubuntu better.
I see in the logs
Jan 16 01:41:14 ubuntu-mate grub-installer: Installing for x86_64-efi platform. grub/x86_ 64-efi- signed/ grubx64. efi.signed' to `/boot/ efi/EFI/ ubuntu/ grubx64. efi': No space left on device.
Jan 16 01:41:19 ubuntu-mate grub-installer: grub-install: error: cannot copy `/usr/lib/
Jan 16 01:41:19 ubuntu-mate grub-installer: error: Running 'grub-install --force --target x86_64-efi "/dev/sda"' failed.
Check you have room in your EFI/ESP partition for the many OSes you have installed. I've had to create a slightly larger EFI/ESP partition for some boxes I do multiple QA-test installs.