Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/8af83fec0a44bc0b6a305022a5afe1bd18b9cef5/doc/images/MicroDexed_Panel/Transparent%20images/Rotate%202/Volume%20Right%202.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.