Visual Composer - Backend Editor Error

If Visual Composer won't load in the back end when you try to edit some page, please first make sure that you are using latest theme version with latest Visual Composer. Please follow update instructions or video guide:


If this is not the case and you have following problems when accessing site or editing pages:

- Failed to load resource: net::ERR_CONTENT_DECODING_FAILED
- customlibEditGallery java script error in the console when you open developer tools in Google Chrome
- not found 404 page is displayed when editing pages

which was confirmed several times with GoDaddy hosting plans and also with few SiteGround hosting users, and problem is hosting related and it is due to mod_security check when some robust and feature rich themes from Theme Forest is used (SiteGround first encountered this with Avada theme).


Add following line to WordPress .htaccess file:

SubstituteMaxLineLength 10m

You can put this line at the end of the file, after the # END WordPress line: