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/9ec3fd5ae33d9dfc358a0d17b12811dfdb7980e0/examples/LMS1DenoiseNotch You should set ROOT_URL correctly, otherwise the web may not work correctly.