Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/acf0bcc6c732d187d9f8b0946464c0438d0a5012/examples/mqttRSSI_FS/data
You should set ROOT_URL correctly, otherwise the web may not work correctly.