If when you try to edit your pages using the visual composer it doesn't load, you can solve the issue by increasing the WordPress memory. To do so, follow these instructions:
1. Access your website via FTP;
2. Open up the wp-config.php file (please save a copy of this file as backup in case you need it);
3. Add the following lines at the end:
define( 'WP_MEMORY_LIMIT', '96M' );
define( 'WP_MAX_MEMORY_LIMIT', '256M' );
If you are still experiencing the issue after increasing the memory feel free to submit a ticket to our support.