Hello Larry,
Thank you for your question about a 404 message. I don't mean to undermine your concern, but the website has been fully functional. I have a few suggestions.
First, please log out and log back in again. There is a message on the dashboard about needing to set a cookie to identify you as human.
That step will also ensure you login to the correct page.
Please reply and let me know if this resolves the issue. But if you still see the issue, please reply and let me know the URL at the top of the page when you see the issue. I'll watch for your reply.
bidslammer