Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/1a83a472976563b24f6fb59c49503263e1d43016/examples/mqttRSSI_FS/data
You should set ROOT_URL correctly, otherwise the web may not work correctly.