Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/8968579f0b6d170b1cfff1da06a3b3607a29f551/examples/mqttRSSI_FS
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Hieromon Ikasamo