Bookmark errors

I have tried to open several links that I had saved and get a similar error message. Error message [404] (none) for port 443 on Saturday, 26-Jun-2021 20:40:59 EDT Have they been moved?

Thank you

I think that is a duplicate HTML page for this page:

Thank you for your quick response. I have quite a few bookmarks, is there a address where I can access them?