Be theme upgrade caused some products on product page to not allow to be added to cart
There are some products that are no longer able to be added to the cart. They just spin and when you look at console errors, there is a POST error:
jquery.min.js:2 POST https://cannilabs.com/wp-admin/admin-ajax.php 500
I thought it was a plug-in issue, but I deactivated all my plug-in's (except woocommerce and Sqaure for Woocommerce) and still this issue is occurring.
Please see this page as an example: