Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/fddbe6302876826b99db33f97e18f5be4b4f99a5/third-party/Bounce2/docs/files/bdwn.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.