Content Query Webpart Error CbqPickerSelectListTitle

I have sharepoint 2013 RTM installed, and suddenly all the columns and content types disappeared. i restored my site to 2 days backword and the columns and content types appeared.

Then when i want to add a content query and configure its properties to select a list i get the attached error

and in the logs i get no relevant errors

Any idea???

Regards Malek