Overview of the Issue
When you click on the FRONTEND EDITOR button the page will be loaded rather than accessing the Visual Composer front-end edit mode..
Workaround
This issue is fixed. Updating to the latest version solves it on your site, so you only need this workaround if you can’t update yet.
To workaround this issue, edit the class-vc-vendor-wpml.php file found in the ../wp-content/plugins/js_composer/include/classes/vendors/plugins/ directory.
Replace the original code:
if ( strpos( $link, 'vc_inline' ) !== false || strpos( $link, 'vc_editable' ) !== false ) {With the following snippet:
if ( strpos( $link, 'vc_inline' ) !== false && strpos( $link, 'vc_editable' ) !== false ) {