Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/commits/commit/d4ddf4092739eb778e67a225348677e12673dd3b/doc/images/manual-images/Preset_Up.png You should set ROOT_URL correctly, otherwise the web may not work correctly.