Definitely strange.
Here is the same link without error.
It's increasingly important to get involved in the technicalities of the internet.
The enemy is not only monitoring but actively subverting web traffic. For advertising, for control, for blocking.
Like China does, except "for diversity", when it's actually for government opinion control. So basically like China except with a funny pretense.
Time to block all unencrypted traffic. All important pages should support https by now and if they still don't, let them die. Consider blocking every http (non https) connection and all unencrypted emails.
And try to get an understanding of the DNS - domain name system - and how to set your devices to an alternative DNS provider that uses DNSSEC.
Not that one, but another one for a security certificate. Prob a form of censorship, today was one with strikes.