TrSv: Failed to register 8000 with uPnP IGD:

[Folaht]

2017-01-25 19:26:44,708 [R] [e[33mWARNe[0m   ] TrSv: Failed to register 8000 with uPnP IGD: UnknownError

[Blaubart]

I have the same error:
2017-03-12 19:46:54,230 [R] [WARN ] TrSv: Failed to register 8000 with uPnP IGD: UnknownError
2017-03-12 19:46:54,239 [R] [INFO ] Init: Loading frameworks...
2017-03-12 19:46:56,984 [R] [INFO ] Init: Initializing Genesis (if present)...
2017-03-12 19:46:57,030 [R] [INFO ] Init: Server is up and ready

Any Ideas how to fix it?