Visual Composer - Can't save post or pages translations

Overview of the issue

Currently, when using the Visual Composer plugin, it is not possible to save a post or page translation. Furthermore, if you refresh the page, the translation status icon switches back to the + icon.

Workaround

Update: This issue has been already solved in Visual Composer 45.0.

Make a full backup of your site before proceeding.

1. Open the wp-content/plugins/visualcomposer/visualcomposer/Modules/Vendors/WpmlController.php file.
2. Replace this code:

   if (!isset($package['contents'])) { return $package; } 

3. With this: