It worked for me too for some months, like from April last year, then suddenly, one day the WiFi stopped working. It didn't happen immediately. What is really strange is that as other people here have reported the wireless survey gets completed successfully showing that the electronic components are operational. Everything it is working as normal except that the camera does not connect to the Wi-Fi.
There is clearly a common pattern with the other case reported, a serious company would be a little more proactive and at least investigate without putting the burden on the users.
What I would like to hear is something like this :
"we would like to investigate this issue, we have arranged to collect your product free of costs, if we determine that the problem has been caused by one of the latest upgrades you will get either the product fixed or a replacement"