Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/c3df658ad1196e8faaf671b1ecd80618833301ba/doc/images/MicroDexed_Panel/Transparent%20images/Rotate%201 You should set ROOT_URL correctly, otherwise the web may not work correctly.