error solved,
i launched the server.exe from wrong folder, not from binaries/plattform/server.exe as it is expected.
i wish they would at least give a error message to the user. when i searched for an solution, i found this problem multiple times (ppl placed it in wrong location. no words about no logging or reaction though :/)
im using Windws 2016 Server RPC session and launched it from explorer.thank u tryed to help