Please update theme and Visual Composer plugin to the latest version and check issue.
Before update delete “woocommerce” folder in the directory wp-content/themes/royal/ and it’ll be reuploaded from a new theme package.
Don’t forget to make backup of the site before update.
Here is video tutorial how to update theme. https://youtu.be/KdWESIIPU1k
(it’s for Legenda theme but the process is the same).
You can download the latest plugins versions at this link http://www.8theme.com/download-plugins/ ,
enter your purchase code of the theme to get the plugins.