Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/2bb395e89a4eefced3564b68bff8c4a46e399107/doc/images/Logo/MicroDexed_logo_2mm_rounded.svg
You should set ROOT_URL correctly, otherwise the web may not work correctly.