I have a lightning component that is called from a button on a layout that is working in the sandbox and I was able to get it successfully deployed to production. I must be missing a setting somewhere. The lightning component builds an email message and sends it. Then it also attaches a visualforce page as a pdf to the custom object. One of my users gets an error when trying to use it in production but not in sandbox. I have given access to the apex classes, objects, fields and visualforce page. I have compared the settings between sandbox and production and still no success. Am I forgetting any other setting?