Tight VNC on Windows Server16

I am no means Windows fella, but due to circumstances have to configure sikuli test suite on Windows Server 2016. The problem I have is that i have installed Tight VNC on it, and when connect to the running VNC server on that Windows Server 2016 instance from Mac VNC Viewer i get login prompt and then after entering the password black screen and it just stays black. RDP does work. Any things i am missing in setup? Thank you.