First, check if your plug was, well, unplugged. If so, that’s an easy fix! Just plug it back in. The Hub has a backup battery that will kick in if it is unplugged, BUT that won’t last forever! That means you have to be sure The Hub is plugged into the wall at all times. The battery will recharge once power is reconnected!
Your Hub will pick back where it left off. Keep an eye out for when it loses power! Sensors cannot brew up insights if The Hub is offline.