Since Installing Safari "Upgrade" Version 15, Safari Constantly Reloading Web Pages

Since installing Safari "Upgrade" Version 15, multiple Web Pages webpages continue to reload every few seconds which renders the website completely useless. Nothing else changed. VERY ANNOYING! I am getting the message - This webpage was reloaded because a problem occurred. Would like help either fixing the problem without spending hours doing it, or reverting back to the previous version of Safari. Thanks.

iMac (27-inch, Late 2013)

OS Version 10.15.7 (19H1417)

Safari Version 15.0 (15612.1.29.41.4, 15612)