Please update Visual Composer and all required plugins http://www.8theme.com/download-plugins/ , also you’re using old theme version.
Before theme 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 create back up of your files and database before starting update process! https://youtu.be/KdWESIIPU1k
(it’s for Legenda theme but the process is the same).