PCoIP "The desktop has no resource available"

I'd like to evaluate PCoIP.  I've obtained trial licences.

I’ve installed the latest PCoIP host agent (23.04) in a Windows 11 host and activated it.

Connexion from a Windows PCoIP client is OK.

Connexion from a Wyse 5070 PCoIP, either ThinOS 8 or 9 (9.4 + PCoIP package) is NOT OK.

“This Desktop has no source available”

No clue why in the Wyse log.

Any idea ?