M2Pro Setup: Password reception failed and TLS error


since yesterday I am trying to connect my M2Pro to start mining.

Unfortunately the LED indication is blinking yellow for several hours now. According to instruction that means got local IP adress. The logging shows following error: daemon.err gwconfd: Password reception failed: 4: Deadline Exceeded Will retry in 60 seconds

Any ideas on how to solve this issue? I already tried to reset to factory, replugging the power supply.

Thanks in advance.