I have been having problems with this on and off lately too. Sometimes it just eventually starts working, or I try rebooting the cameras, or a number of other things. It is frustrating though (for my pan cam I had to reformat the SD card and revert the firmware to an earlier build to get it to work again, while the other cams eventually start working again, but not sure what the problem was. I tried reverting firmware on one of them too to see if that helps).
Anyway, I beta test for at least 10 apps and have had to undo it when things got bad on some of them. To opt out of Beta on Android, you should just go to the app’s main page on the play store and you will see it look like this:
See at the bottom of the screenshot where it says “You’re a beta tester” and it has an option to select for “Leave”? This is how you convert back out of beta testing to use a normal app. Click “Leave” and you should be good.