Wyze cam suddenly not working with Tiny Cam Pro. Can't download the app from play store

I've got 3 Wyze cams on three different small tablets all running Tiny Cam Pro. I've never had an issue until this morning. One of the tablets (cheap ONN Walmart) suddenly wasn't showing the camera. I noticed the app was gone as well! I went to the play store and tried installing the app again. I starts to download for about two seconds and stops. Any ideas on what's going on? Thanks!