OTA not working

Hello together,

i want to enable OTA for my Arduinos.

I use Arduino IDE 1.8.13, Python 2.7.17 (python --version in cmd - so it is in the path)

I am in the same network -> The D1 mini gets an IP and can be pinged - nmap does not see an open port

and the IDE does not detect the OTA Port.

As sketch i use the OTA Basic example with adopted ssid and pw.

I dont see an errormessage in the IDE Console.

What can i do?

Best regards

Heiko