As I see you are using outdated theme and required plugins.
Please update all the items to the latest versions.
Before update delete “woocommerce” folder in the directory wp-content/themes/legenda/ and it’ll be reuploaded from a new theme package.
Required plugins can be downloaded here http://www.8theme.com/download-plugins/ .
Don’t forget to create back up of your files and database before starting update process!