Error transcoding mkv using Proxmox

[joshuas_79]

Today I tried again. I followed another guide. I could add the mount properly but my container crashes when I add this line inside of container conf file:

lxc.mount.entry: /dev/dri/renderD128 dev/dri/renderD128 none bind,optional,create=file

here is the entire conf file:
https://pastebin.com/L8ysAgLX

the render GID in the lxc console is 106

Can you help me to find the issue out?

thanks again