Ok, so I set the Role Pricing in the Dynamic Pricing extension of WooCommerce to provide specific discounts per role of the user. The thing is, when a certain role is logged in, say, a user with an Expert role with percentage discount of 25% for all products, the cart doesn't work anymore. Meaning, when the user clicks on the Add to Cart button, it refreshes to a blank page. All white. All nada.
At first I didn't know that this extension is the one causing it, but I tried logging in to a user role without percentage discount enabled and the cart works fine, so I went and tried disabling the percentage discount for the Expert role, and voila! The cart worked again. So I'm pretty sure the Dynamic Pricing extension messed this up. Any insight regarding this is very great help.
Note: We also use the Gravity Forms extension alongside Dynamic Pricing.
WooCommerce Version: 1.6.6