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/e1ba74006b86130a1ba14fbb3a404c64fae71cc9/docs/scripts You should set ROOT_URL correctly, otherwise the web may not work correctly.