You didn't say how you are trying to get the cams but the pop ups in the orange areas are working ok.  You might check your internet speed if too low will prevent you from being able to see them.  Try a reboot of your pc also.  It does seem like something on your end though since others have not had problem and you were able  to previously.

God grant me the serenity to accept the things I can not change, courage to change the things that I can, and the wisdom to know the difference.... especially when the cams go down.