Mint 21.2: No sound, no encryption and bootloops

[theincogtion]

My first attempt was to install Mint with Full Disk Encryption via LVM but this means that the folder /target is empty so I opted to not use encryption :(
A bigger problem is that I run into a bootloop at startup. The only way around is to got into the bios, leave the bios and then it boots normally.

efibootmgr Timeout: 1 seconds BootOrder: 0001 Boot0001* ubuntu

Any help is highly welcome :)