I am setting up a store that does not require a login to purchase items.  All of my products behaved properly until I added variants (warranty options) to some of them.  When you click the "add options" button for the products with variants, it goes to a login screen rather than to the product details screen.  I have looked everywhere for a solution to this problem and have been unable to find one.  If you click the "add to cart" button for the products without variants and then click the "view cart" button, it works without a login.  Apparently, it is requiring a login any time you want to see a product details page (for any product).  I do not have the "require login" option checked for any product.  Any help would be greatly appreciated!