Won't work in Unraid

Hi, I don't know if this is meant to work in Unraid, but can't seem to get it done.

I've done exactly as suggested, using the Jellyfin amdgpu mod as a reference.

No matter what I do, when I try to transcode a HEVC file to x264, it simply fails.

Running the docker exec code in the terminal shows that vaapi is working correctly.