I have an issue with the Woocommerce single product pages. They are not displaying. When a product is clicked it just reloads category content although the url suggests it should be a single product page.
I first noticed the problem after I updated two plugins, the Mailchimp widget and Duplicator
It seems to be a permalinks issue. Try to reconfigure it in admin panel -> Settings -> Permalinks and resave. If it will not help then provide us your admin panel so we could try ourselves.