Hello,
You’re using very old theme version.
Please update the theme to the latest version and Woocommerce as well.
Before update delete “woocommerce” folder in the directory wp-content/themes/legenda/ and it’ll be reuploaded from a new theme package.
Also update all required plugins https://www.8theme.com/download-plugins/ .
Don’t forget to create back up of your files and database before starting update process!
Also you need delete “wpbakery” folder in wp-content/themes/legenda directory as Visual Composer can be installed as a separate plugin now. In this case some pages (where you created Parallax background) will have to be recreated.
Best regards,
Jack Richardson.