[SOLVED] – Explicitly Defining –no-rename when installing

Been trying to install Proxmox again after having some issues with booting from an old install. Going to install fresh 8.1-2 and get all the way through set up, however installation fails at the “Making device bootable” section. Pulled the drive and replaced it, got the same error. Wiped both drives, put new (debian) OSes on them, and was able to boot on a test system. Rules out drive issues. Tried once more to install 8.1, checked the detailed error message and saw a few things that piqued my interest.

Warning: Cannot set EFI variable Boot0008.
Warning: efivarfs_set_variable: writing to fd 6 failed: Invalid argument.
Warning: _efi_set_variable_mode: ops->set_variable() failed: Invalid argument.
Error: failed to register the EFI boot entry: Invalid argument.
…
[ Boot using Grub on ‘/dev/sda2/”; unable to install the EFI boot loader on ‘/dev/sda’ please specify –no-rename explicitly, the default will change to –rename in 1.20.x
…

Trimmed out a few parts i can’t read entirely (kvm has a bad habit of cutting off the left hand side of the screen).

So here’s my question: how do I do what it is asking? It seems simple enough, declare the argument, and I’m all set right? I’m not a practiced linux uiser, so I tend to use the graphical interface to install my OSes, so is there some guide on how to insert the argument needed at the correct time? Will have to do a full CLI installation? If so is there a guide on how to do so? Any info on the process would be appreciated.

Thanks,