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/c934c830b669ea043a889727cc60ebb047095bce/j2se/.externalToolBuilders
You should set ROOT_URL correctly, otherwise the web may not work correctly.