Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/ef32d1fc9597050f2524165b1a39f0ce520f4356/mkdocs/images/ac_json.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.
