SharePoint Designer 2013 doesn't open

When I open my SharePoint site on SharePoint Designer 2013, I got this error. I logged with username and password and then:

When I clicked Details buttons:

I searched on the net this problem, I looked this url http://ift.tt/1EpvPWtenter link description here

But my site is broken and doesn't open when change disable to enable anonymous authentication.

How can i solve this problem with another way? I can't open designer and I can't edit any page.