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/324d2bbef03a288fe435a65fed2dfe25d63b2166/docs/font-awesome
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Chip Audette