I upgraded…now I can't access my 'text body' at all!?

This is really weird. I just upgraded to 3.9 before I was to put out a new post on my site. But when I tried to access the text body, I couldn’t even get it to ‘enter the area’. What’s up, and how do I fix it?

Here’s a screen grab:

https://postimg.org/image/qx9m87vir/