Yeah, someone else said it's not enabled for everyone.
It might just be settings? Do you have "Always use secure connections" turned on? I don't remember if that was a manual toggle or not.
However it's triggered, I hope they make the UI better before they deploy it more widely.
And I'll quote the exact text for you:
[warning triangle]
The connection to 192.168.0.40 is not secure
You are seeing this warning because this site does not support HTTPS. Learn more
[Continue to site] [Go back]
Then when I click continue, the only sign it's doing anything is that the reload arrow becomes a stop X. After 20 seconds it moves on to "This site can't be reached".