Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/AutoConnect/src/commit/e790a0f4ac7aa9275a516ec462e2ca49dfb10642/examples/mqttRSSI_FS/data
You should set ROOT_URL correctly, otherwise the web may not work correctly.