Are the cameras completely, totally offline? (Cloud icon with diagonal bar through it) If so a personal visit might be in order to reset them. A pain I know - I have some over an hour away waiting for my visit. 
Or can you view events from the cams but nothing else? If so contact support and submit a logfile to @UserCustomerGwen in this thread:
Hereās the list of error codes. Naturally 13 falls under āall otherā connection failed.
Hereās where to file a support ticket:
https://support.wyzecam.com/hc/en-us
And I ~think~ this is the number people have had good luck calling for live support
1 (844) 999-3226