Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/src/commit/e64f16de5b20b74db56bec2ea93506b004301e54/doc/manuals/MicroDexed-User_Manual You should set ROOT_URL correctly, otherwise the web may not work correctly.