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/8fbac3562bb00aa5fc752671cac47b5fe4da7c71/examples/TestTwinPeaks
You should set ROOT_URL correctly, otherwise the web may not work correctly.