Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/commits/commit/ddb36fa3d6fab68b228970ba489292ebc1e463c7/doc/manuals/MicroDexed-Build_Manual/images You should set ROOT_URL correctly, otherwise the web may not work correctly.