Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/34a0d45b734ed59ecfa91368f84a2da1730b22b0/mkdocs/images/established.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.
