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.