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/21a603a0093e5730ad4ddc71a3ab1fedf41c11fb/docs/bootstrap/js
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Chip Audette