Connection stopped after login

Andrea Vironda 811 Reputation points

I configured UVNC server on my WS2012 and the viewer on my W10 PC.
I successfully reach it using a DynamicDNS and 5900 port.
When I'm asked to login by windows (not by VNC, I can proceed after this step), I enter credentials, press enter and then the program freezes.

Do you have any explanation? I think the problem is in how WS2012 manages connections.
Using RD tabs I have no problem

Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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