The device rebooted 3 times in under 60 seconds and entered safe mode to prevent a crash loop.
Bus writes, MQTT, BLE and background fetches are disabled — that's why the dashboard is empty.
Try a reboot first — most safe-mode entries clear cleanly on a healthy restart. If it keeps recurring, roll back to the previous firmware from System.
HeatSync hasn't seen any traffic on the bus yet. Check the wiring (F1/F2 on the indoor unit) — polarity is forgiving on most Samsung units. Once packets start flowing this page will populate automatically.