Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/3f4e4e492be463be190ef02fd56da8a1841cba97/mkdocs/images/config_ssid.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.
