I purchase the theme and updated my previous version of the theme as instructed in the documentation.
I also saved the options but still my product pages are not showing any sort of style.
it seems that the proper css file is not loading on product pages and single product pages.
Site URL: hidden Theme version: Latest version WooCommerce version: 4.8.1
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Please check theme version in style.css file of an archive that you downloaded from ThemeForest. If in this style.css file you will find the latest theme version, that means there was some mistake in your update process.
I would recommend you restore the site from backup and repeat update process via ftp http://www.8theme.com/demo/docs/idstore/#!/upgrade
Don’t forget to create backup of your files and database before starting update process and export Theme Options in file http://prntscr.com/gbziy3
Before uploading theme files delete “woocommerce” folder, which is located in wp-content/themes/legenda/ to avoid problems with old files.