Safari 15.0 error message: "A problem repeatedly occurred:" Catalina 10.15.7

I have had no problems with Safari until recently on my home Mac. The identical Mac at the office does not suffer this error messageAttempts to visit certain websites ( banks, etc.) produce the error:

Home Depot:

Google returns articles and videos that suggest toggling settings or clearing caches (this does not work, nor did I expect it to), however, they do not provide for diagnosing the root cause of the problem with a procedure and a "litmus test" (observable evidence confirming root cause). An example:

https://www.youtube.com/watch?v=vAiBIbl66mc

Is there a procedure to diagnose confirm that there is not a problem with the version of Safari and that there is something I did to put Safari in its current state?

Solution 1:

Reinstalling Safari 15.0 solved this problem for me:

https://discussions.apple.com/thread/253165554

The link to download the .pkg to reinstall is:

http://swcdn.apple.com/content/downloads/15/01/002-02859-A_TFTOEP7KTW/c962h7kwercno4bxxaql4o2g03y80pefij/Safari15.0CatalinaAuto.pkg