I have three of the battery cam pros. They worked fine until we changed the WiFi password. I brought them inside near the router and did a reset and went thru the usual setup. They get through two of the three steps and the camera times out before finishing set up. I have updated firmware and apps. The network is a 2.4g created just for the Wyze cams. The SD card is removed from the cameras. The other 20 Wyze cam V4 are working fine on the same WiFi. Only the Battery Cam Pro are not finishing setup…
May you can find some information that will help here: Especially about the password.
https://support.wyze.com/hc/en-us/articles/17502388798747-Wyze-Battery-Cam-Pro-Setup-Troubleshooting