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/1b45fbeb46b72d32113629ca1ed31bbcd7afec01/android/.externalToolBuilders
You should set ROOT_URL correctly, otherwise the web may not work correctly.