Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/MicroDexed/commits/commit/64ad2968c775b40035d92178d6d849b25351911e/doc/manuals/MicroDexed-User_Manual/images/10_BankUpload_12.jpg You should set ROOT_URL correctly, otherwise the web may not work correctly.