My Favorite Weeds

[voyager]

The only other possibility I can think of is:
Do you have an anti-malware like Malwarebytes?

I do use a free web host. Sometimes someone will setup a "Bad" site on one of these free hosts. Sometimes the host can get blocked for a while until everything gets straightened out. Although, I do not think that is the problem here. If that was the source of the problem you would be notified by the anti-malware program that it was blocking it. I'm at a loss other than I suspect some obscure security setting in Windows or the browser is blocking access to it. But, that's just a wild guess.
Another thought occurs to me.
My ISP will sometimes temporarily block access to some sites while only giving some obscure reason for doing so.
The nature of the notification leads me to think the problem is somewhere on your end of the connection. Sorry I can't be of more help.