When I tested the free version, I was able to get the variable product to work with this role based plugin. After installing (AND PAYING FOR) the pro version, it stopped working. It is not showing me the user roles on the product page, and all the variable titles are messed up.
In case if anyone else has similar issues – as we figured out in private emails – problem was that our “Price based on User Role for WooCommerce” is listing only available variations. That is – if you didn’t set standard price for the variation, it is “disabled” and because of that is not listed in “Price by User Role: Per Product Settings” meta box. This behaviour is changed in plugin version 1.2.0 – now plugin is listing all (i.e. even disabled/unavailable) variations in meta box.