How to remove "TypeError: c is null" in Wordpress Page Edit Area

Question

I have a website built in wordpress CMS by using Visual Composer. When ever i Add/Edit Page content i have always got an Error.

TypeError: c is null

...var b=a.getWin(),c=b.getSelection();if(!(c.rangeCount<=0)){var d="SELRES_"+Math....

How i can remove this.

Answer 1

Emergency solution: don't use Firefox; if you use Opera or Chrome you will not get that error and the visual composer works. With an older version of Opera (45.0.X) I don't get any error.

Best solution: upgrade Visual Composer.

Answer 2

Upgrade to latest version (5.4) of WPBakery Page Builder (formerly Visual Composer) solved the problem in my case.