Hi @fabian and @surfer2100, I fixed it! :)
Here's a small writeup of my steps, maybe helpful to someone in the future:
Using my Rescuezilla image I restored my proxmox installation, so I was able to boot normally.
I mounted /boot/efi using...
Hi everyone,
While upgrading from Proxmox 8 to 9 I had the following error while running apt dist-upgrade:
Setting up grub-efi-amd64 (2.12-9+pmx2) ...
Replacing config file /etc/default/grub with new version
Installing for x86_64-efi platform...