We have a site on Joomla 3 using Jomsocial. For the registration of jomsocial we have bought the stripe integration and coupon code integration. When using the coupon feature it says it's accepted successfully. We hit ok and it redirects to a 404 page not found. We have gone through thousands of lines of code. Hundreds of server files. We now at our ends wits. I thought before giving up on jomsocial as we go to J5 I would make an attempt to see if we can get a solution here.