Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/music-synthesizer-for-android/src/commit/68b44a4a89b58794aa5a871e91c44b3537b1f27c/android/jni
You should set ROOT_URL correctly, otherwise the web may not work correctly.