Definitely do what @Newshound indicated, the logs need to be sent. In addition, have you tried removing the power from the device waiting for about 30 seconds and then plugging it back in?
I have found that this will bring the camera back online in the app. To Refresh the screen, simply Pull Down on the Home Page.
In addition, you could try the following:
- Start the App and go to the Account Menu Option, Tap on the App Settings and Clear Cache from there.
- Shut the App Down
- Seeing you are an Android user: Long Press on the app, choose App Info, do a Force Stop, then go to Storage and Cache, clear Cache here as well. I always restart the phone at this point.
- When the phone comes up, see if you can connect to all of your cameras. This will restore all of the thumbnails and should show all camera’s as online.