bootloader setup errors on installation

[Darkrys]

Hello,

I try to install PVE on a lenovo thinkcenter but at the end of the installation I've got the message :

bootloader setup errors:
- failed to prepare EFI boot using Grub on '/dev/nvme0n1p2': unable to install the EFI boot loader on '/dev/nvme0n1'

I tryed to ran rm /sys/firmware/efi/efivars/dump-* but I still have the message.

Anyone can help me ?

Thanks

Cordially