Safari 15.0 Update - Can't Load Financial Log-in Pages

Does anyone else have this problem. Updated Safari to 15.0 today. Now I can't load the log-in page of most of my Financial websites...Citibank, Fidelity, Wells Fargo. Also Xfinity Comcast.com. I get a message

" A problem has repeatedly occurred with hippos/www.xxxx.com" Trying to reload the webpage does not work. Only AMEX is unaffected.

So, I can get to the Home page of these financial Institutions but when I hit the Log-in button in the menu bar I get the message as above. I can't load the log in page.

I believe others have experienced this problem, which started today with downloading Safari 15.

I chatted with Apple Support but they were unaware of the problem