Until recently I have been able to use the chat feature just fine, but now I can't log in to chat. It seems that this feature is now relying on a cookie or web store at
As I'm blocking third-party cookies and have no intentions of doing otherwise it seems that I can't use chat any more.
Why has this change happened? And could it be undone?
If you need to chat NOW, both balpha and the only part of the help page that I didn't read have a solution:
Go to https://meta.stackoverflow.com/users/chat-stackexchange-login (or the same URL on any Stack Exchange site where you're logged in) and click the button.