Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/OpenAudio_ArduinoLibrary/commit/2e6a2c85516f8126a6b092931d242d2cdfe79df6?style=unified&whitespace=ignore-change
You should set ROOT_URL correctly, otherwise the web may not work correctly.