Any idea yet?
I do have the same problem.
In a 3 node cluster, I normally log on to the first server and do my work from there.
Starting a SPICE session for a VM on this node works pretty well, trying to start a session for a VM residing on a nother node via the first server ends with an http proxy error, sie resolis post.
DNS etc works fine, pveproxy also.
It's quite tedious to log on to the respective node to start a session.
Any hints?
TIA
W.