Stick up cam streaming error

I just finished installing and setting up a pair of stick up cams, with wired power. Both compled setup and one installed updates. The other was happy without updates. The camera that didn't update briefly uploaded video of me completing the installation. One indicates an RSSI of -67 dB (the one that received the update), the other (the one that didn't need updates and uploaded video) says -63 dB. They're placed outside, about 20 feet from the router, which is just below a window on the same side of the house. When my phone is where the cameras are installed, it reports it's receiving maximum WiFi signal strength. I also have a Ring Doorbell that is about the same distance from the router, but in the oppocite direction. It reports an RSSI of -43 dB, which is clearly a lot better. When I try to access live view on either stickup camera I just get a "streaming error". I've retried repeatedly, but always get the same "streaming error" message. Meanwhile the doorbell camera works wonderfully. The doorbell working suggests to me that the router and my cable bandwidth are not a problem. So why won't brand new cameras that sucessfully completed setup stream video?