I have an HPE microserver gen 8 that I just upgrade to version 9 and I get those terrible failures on boot.
I initially tried to do a clean install but it showed an error related to GRUB files, so I installed version 8 and then upgraded to 9 (`pve8to9 --full` showed no errors).
I followed the official guide and everything seemed to go well, but when I rebooted the machine I got those errors.
I can boot to the previous version of the kernel and to the recovery mode of the new kernel, but I am not sure what I need to do from here to fix this.
I can continue with the old kernel, but I still prefer to be on the latest version if possible.

I initially tried to do a clean install but it showed an error related to GRUB files, so I installed version 8 and then upgraded to 9 (`pve8to9 --full` showed no errors).
I followed the official guide and everything seemed to go well, but when I rebooted the machine I got those errors.
I can boot to the previous version of the kernel and to the recovery mode of the new kernel, but I am not sure what I need to do from here to fix this.
I can continue with the old kernel, but I still prefer to be on the latest version if possible.
