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/164986fc4a2b05b7df2cf18561d6911e75a410c2/examples/CESSB_ZeroIF
You should set ROOT_URL correctly, otherwise the web may not work correctly.