Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/b0c93e8b75db583c2c050f74540c2e545646d027/examples/mqttRSSI_FS
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Hieromon Ikasamo