shahram51

my problem is in the pages ( not post )
now all of menus in my wordpress back office work perfect ( and also front page ) , but when I click on the :

pages
add new
all page

in the admin menu , it shows me blank page

I had no problem before , my main problem now is with clicking on the tools ( sixth tab in the Html import setting ) after a while it don’t show me the import folders and import button , but it works perfect before

how can i diagnose it?