NoMachine main UI won’t open on Windows

[skier23]

I succesfully installed NoMachine on Ubuntu. On Windows, it’s installed and running the server but the UI won’t open. I tried the nomachine app, the nomachine player exe, “show main window”, “show server status”,  in the task bar, and neither will display anything. “show transfer status”, “show whiteboard”, “show recording status” will open a gui. I checked the logs in trace.log and see an error:   Tue Sep 16 14:00:31 2025 ------------------------   Module: C:\Program Files\NoMachine\bin\nxplayer.bin pid 5532   Thread: 2976 exception 0x6ab, 'Unknown'   In: C:\WINDOWS\System32\KERNELBASE.dll at 0x1ce9cf19   #0  0x000000001ce9cf19 KERNELBASE.dll(RaiseException) #1  0x000000001d7104f0 RPCRT4.dll(RpcRaiseException) #2  0x000000001d7104b4 RPCRT4.dll(RpcRaiseException) #3  0x000000001d7bd7d9 RPCRT4.dll(Ndr64AsyncServerCallAll) #4  0x000000001d7c05d0 RPCRT4.dll(NdrClientCall3) #5  0x000000001bb1139e wkscli.dll <code></code>

 

Also, if I try to quit nomachine (with administrator elevation), I get: Authentication failed, NoMachine application cannot be closed.

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