I found the conflict plugin. It is the BuddyPress Like plugin. When I deactivate it I am able to edit the theme. Is there anything to do about it? Or just deactivate for now and than activate on production?
I´ve deactivaded BR language and went to dashboard > apparence > menus and open screen options. It is frozen when the buddypress plugins is enabled. When is disabled all works fine.
The theme is Buddy for Buddypress. I have tried with twenty thirteen and 4 other themes, also no luck with the buddypress plugin enabled. When the plugin is disabled all works fine.
