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/ce3a933e05d9fc0e59b319fe06ae976c75ea9d5c/examples/TestOutput_float
You should set ROOT_URL correctly, otherwise the web may not work correctly.