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/ce0032dd789ce3bd01d9107c711dd9ac2692afa8/examples/OscillatorWithPitchmod_Float
You should set ROOT_URL correctly, otherwise the web may not work correctly.