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/commits/commit/10392e8260c2477d48b1a5a960f42e524a48be56/android/res/layout/oscillator.xml
You should set ROOT_URL correctly, otherwise the web may not work correctly.