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/86b0b29a207ef1cfe39f70c97cc269585271480c/examples/TestEqualizer1
You should set ROOT_URL correctly, otherwise the web may not work correctly.