The designView of my content_main.xml is not displayed

even i resynced the gradle,i still cant see the design view.it happens with all projects,Even i started a totaly new project and it has the same problem

picture of Errors :

picture of Errors

Errors: 1)Render problem: failed to find style 'coordinateLayoutStyle' in current theme.

2)Using private resources: The resources @string/appbar_scrolling_view_behaviour is marked as private in com.android.support.design .

3) Missing styles: Missing styles, is the correct theme chosen for this layout?

4) Failed to instantiate one or more classes: The following classes could not be instantiated: -android.support.design.widget.CoordinatorLayout -android.support.design.widget.AppbarLayout