can't delete

So, everything was fine until yesterday and then I had to turn off the breaker for some work to get done on the house. Upon power-up all kinds of issues with the Nest Guard not connecting. 3 nodes, Ethernet backhaul, AiMesh Router Mode, 5GHz SmartConnect with 1 SSID for 5-1/5-2, 1 SSID for 2.4...