Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/09c4feb59284df1f28bfcf7d1d19c21cb18db682/doc/images/MicroDexed_Panel/Transparent%20images/Rotate%201/Volume%20Down.png You should set ROOT_URL correctly, otherwise the web may not work correctly.