haha so I think I am going to be your new favorite person. Just spent two days on this beast. Not sure this will fix everyone’s problem, but is a really silly issue:
It appears the tabbed content container in newer woocommerce has a class of ‘woocommerce-tabs’ whereas in older version it was ‘woocommerce_tabs’.
I just went in and changed the class to have the underscore and my tabs are working now. The content is a little out of place I’m going to do a quick css fix cause I am good with css, but if you let your theme developers know, it seems a lot of themes are using the old class for the tabbed content, so when it is not targeting it properly. Should be an easy fix for most people, I do not have time to point to all files, but here is where you can find the base file for the tabbed content container:
line 287 : wp-content/plugins/woocommerce/templates/single-product/tabs/tabs.php
Hope this helps, I am usually the one looking these issues up not posting the fixes.