Stick up cam - connection problems when battery/power disconnected

I have two stick up cams, an Elite and a battery. They are both exhibiting the same problem at the moment. When the battery ran out, I replaced it with a spare, the lights came back on on the front, but it was not connected to the app, it insisted the wifi connection was lost. I tried to manually reset it and it kept insisting that the wifi password was incorrect (it wasn't) The same thing has now happened to the elite when I had to unplug it for a few seconds. From the front of the unit, the red lights come on when motion is detected and the blue light is on when it's recording. I am getting nothing recorded and cannot access either of them. (My other two cams are working fine, so there's no problem with the router) I have a Netgear Nighthawk router btw.