Live view has stopped working.

I have done all the checks. Wi-Fi speed is over 20mbps up and down. Wi-Fi network in the house is strong (I have scanned it), and have deleted and added the app. On device health the battery says empty, even tho it is full. Signal strength is highlighted as red, even if I put it directly next to the router! Can view recordings, but nothing live, which makes it fine as a security cam, but redundant as a doorbell. Any ideas?