Error in Post Editor

At the Post Editor (where you create or edit post), the following error is displayed in the Console...

Uncaught ReferenceError: FB is not defined
(anonymous function)

Uncaught ReferenceError: FB is not defined [check_permissions.js:36]
(anonymous function)check_permissions.js:36
f.Callbacks.nload-scripts.php:2
f.Callbacks.o.fireWithload-scripts.php:2
e.extend.readyload-scripts.php:2
c.addEventListener.B

I cannot publish to Facebook.