Plex Can't Select Nvidia GPU

In the Plex app config I see the choices for “Allocate x nvidia.com/GPU” where x is 0 to 5.

I have one GPU:
02:00.0 VGA compatible controller: NVIDIA Corporation GP107GL [Quadro P400] (rev a1)

But when I select 1, I receive the error message:

middlewared.service_exception.ValidationErrors: [EINVAL] values.plexGPU.nvidia.com/gpu: Invalid choice: 1

Why?

It seems the ix chart for Plex is really screwed up. I can’t transcode anything either without a storage error (different post).

This is a new install of TrueNAS from scratch, coming from 22.x version before using TrueCharts and everything worked perfectly.

Should I just go to nightly and try the 24.10 version in advance? :-/

Any hints would be appreciated.