After we got a new WiFi network at home, I could no longer connect the cameras to the new WifI network. I have reset the cameras, removed them from the google home app and tried adding them again. None of this worked.
Until I decided to buy a separate power cable for the battery version of the camera. I removed the cameras outside and then connected them to the socket with the cable that is actually suitable for the battery version. I then reset the camera again and added it to the Google Home app and this now worked! The camera was found in the Google Home app. After the installation process, I disconnected the cameras from the power inside and hung them outside again (only then did I have a picture). So this is the solution for non-working wired cameras. Good luck!
I bought this cable:
