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/blame/commit/e3b5ceebfcec304e9a1d3c89dc358df78047e58e/core/.gitignore You should set ROOT_URL correctly, otherwise the web may not work correctly.