WYSWYG editor is gone with upgrade!

My editor is gone after upgrade…the html still works but the visual editor part with all the editing buttons is not working. I went and deactivated all the plugins and when I do that the post totally disappears, it’s still there in the html but when I switch over to the visual part it is gone.
I’m not great with html so I use the visual editor to write all my posts. Some help would be greatly appreciated.