1-2. Please update the theme to the latest version 3.0.3.
Before update delete “woocommerce” folder in the directory wp-content/themes/legenda/ 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
Also, try to disable all 3rd-party plugins, clear browser cache and check issue after that.