Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/0785ee32485fe7eb944f88e98c52de51f766dd05/addon/SD/drm/StdDrums/rd01.wav
You should set ROOT_URL correctly, otherwise the web may not work correctly.