Cameras keep going offline

We have a front and back yard camera. They were working yesterday but when it got dark, the back stopped working. By this morning both cameras will not activate through the app. Anyone else have this problem?
Also, the app shows both cameras as being online but when i click live view it just spins and says activating device

My stick up cams keep going offline. The door cams don’t go offline. Wondering if they are defective.