Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/d5ca170a8611489f50027f48e5ef221055ed1e07/examples/mqttRSSI
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Hieromon Ikasamo