Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/OpenAudio_ArduinoLibrary/src/commit/70b8ce6c4449f36a29d7390a0740735a5217e089/examples/testWDRC2
You should set ROOT_URL correctly, otherwise the web may not work correctly.