Running RoonServer as a windows service

Since some days (maybe since installation of build 970) I am not able to start RoonServer as service using nssm on a Windows 2019 server.

nssm start RoonServer replies
RoonServer: Unexpected status SERVICE_PAUSED in response to START control.

Log file of nssm (RoonServer logs are empty) shows :
Unbehandelte Ausnahme: System.TypeLoadException: Der Typ “MessageHandler” in der Assembly “RoonApp, Version=, Culture=neutral, PublicKeyToken=null” konnte nicht geladen werden.
bei Sooloos.App.InitPing()
bei Sooloos.App.Init()
bei Sooloos.App.Main(String[] argv)

RoonServer starts correct when I run RoonAppliance. If I start RoonServer it immediately ends without log message.

Maybe I should start RoonAppliance with nssm ?

Make sure that .NET Framework 3.5 is installed:

If that is the case or doesn’t help, follow the troubleshooting steps from the guide until RoonServer starts again or you have completed the “Next Steps”: