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/a03836940c6eacb11bd2b9527555e3e18711d000/examples/TestFFT256iq
You should set ROOT_URL correctly, otherwise the web may not work correctly.
boblark