Error 8000274c Fail to connect

After a power outage, my cameras show “Error 8000274c fail to connect.” I can’t seem to find any cameras when I try to log into them. It must be an IP address configuration issue but it looks like my Ethernet is on the “same page” with respect to the IP address. So I am a bit at a loss to figure it out. Perhaps the easiest way is to simply reinstall the cameras? Any suggestions would be most helpful?
 
More info needed:

To what do the cameras "connect" when working OK? NVR? Computer? :idk:
 
Yes still using Blue Iris.
That info belonged in your first post! :cool:

Anyway, is the LAN IP of your BI server static?
If so, what is that IP?
Can you ping ANY cam from the BI server in a command line window?
Are the cams' IP's static as well?
 
How are cams powered? POE switch?
A sketch of your network (cams=>switch=>PC=>router. etc.) would help so I can better assist and assist more quickly.

Imagine if someone is asking YOU how to start their tractor and you have no idea if it's gas, Diesel, hydrostatic transmission, or gearbox/clutch, etc..
Try to paint us a verbal picture of what you have so we don't have to extract the info from you a post/reply at a time. :idk: