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/da3e1dc6e57f5cdfd29da67b7717ff8d3c5131f3/examples/TestFIRGeneralLarge5
You should set ROOT_URL correctly, otherwise the web may not work correctly.