Hello,
Thank you for creating a topic here.
It seems that not all files were replaced when you update the theme. Check for example this file on your web-site basel/woocommerce/single-product/add-to-cart/variable-swatches.php and compare it to the one from archive downloaded from themeforest.
In case they are equal we will need your FTP access so we could take a closer look at your files and try to find the problem.
Regards
