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How to remove "TypeError: c is null" in the editing area of ​​a Wordpress page

I have a website created in Wordpress CMS using Visual Composer. When I ever add / edit page content, I always had an error.

TypeError: c is null

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

enter image description here

How can I remove this.

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2 answers

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

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Emergency solution: do not use Firefox; if you use Opera or Chrome, you will not get this error and the visual composer works. With an older version of Opera (45.0.X), I get no errors.

: Visual Composer.

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