Web pages reloading error, can't bring up websites I've been to countless times
All of a sudden, for major websites I've visited for years (my bank, airline, etc) I can no longer access them on Safari. As soon as I type the URL and hit Enter, the page will start reloading immediately, 2-3 times, and then I get this error: "A problem has repeatedly occurred with <website URL>.
I am using Safari 13.1 on a MacOS High Sierra v. 10.13.6. I have not added any new software or changed settings. All these sites are ones I've accessed for years and very recently, and now I cannot even get to their home page. I've tried clearing history, entering the web address manually, and have tried for days now. I was able to get on this Apple Support site without this problem so why am I having problems with other websites?
MacBook Pro 13", macOS 10.13