Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/OpenAudio_ArduinoLibrary/commit/89a5fb96c69bd3f61eac06217b2d5ea1f248c5a3?style=unified&whitespace=ignore-change
You should set ROOT_URL correctly, otherwise the web may not work correctly.