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/7e6b7623747a0aacd904d4b3ff8431e41c467b44/examples/MyAudioEffect_Float
You should set ROOT_URL correctly, otherwise the web may not work correctly.