why is safari not opening some websites on catalina since update

There have recently been many reports of a broad range of new problems on this support site about the latest release of Safari v15. It is included in the downloads for Big Sur and Catalina. If you are experiencing these problems, you can use another browser such as Firefox or Chrome and they will work for you until a newer version of Safari is released.

gebby609 wrote:

Update to my question:

I reinstalled Safari 15 and it seems to be working properly.

Good computing gebby609 ! Thanks for your follow up.