Connection to Spice server dropped?

I have the firewall port vnc-server 5900-5903 open and Remmina installed on MX Linux trying to connect, but getting the “Connection to Spice server dropped” message. What do I need to check and / or set to get this working?

As I’m looking at a filtered list of Services, does the spice-vdagentd.socket needs to be running on the server?

EDIT: Wait, I’m doing this wrong, be right back…