Did you follow the "factory reset" instructions (not the "restart" instructions), which call for pressing the reset button until the status light flashes yellow 4 times at 10 seconds and the status light turns a solid yellow at 12 seconds, followed by a confirmation tone?
I was having the same issue when I changed my internet router, what worked for me is using a different device that the floodlight camera was never connected too before. In my case my phone and laptop both had the joining connection issue, so I added my son as a household member which gave him manger access and I was able to add my floodlight camera through his phone no issues at all. Hope this helps
I had a similar experience. In my case, I was successful when I used a slightly older Pixel that was not up to date on security patches. Curious what phone/OS you and your son use.
