Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/5421a342150fd2704001dd32596115039cd41e8a/doc/images/MicroDexed_Panel/Transparent%20images/Rotate%201/Presets%20Right.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.