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/241280fafcadbd849f8fbfbef18f30da88a5ef14/examples/TestFIRGeneral3 You should set ROOT_URL correctly, otherwise the web may not work correctly.
 
 
OpenAudio_ArduinoLibrary/examples/TestFIRGeneral3
..
TestFIRGeneral3.ino