Cannot Log in to Edit Website

I use Godaddy and about a month ago I changed my DNS to use Cloudfare. My website is kevpaints dot com I have had no problems until today. When I go to the site all works well but when I try to Edit the site I get this message SEE BELOW Attachment. I cannot follow the instructions on the message as there is no way to bypass this message,

I need to make some edits to the site how do I get any further than this page, I have checked the DNS and where Cloudfare points to but no matter what I do I cannot get passed this page.

I am not very familiar with the language used here and don’t really understand so please be gentle and try explaining in the most simple terms. Thank you.