Paypal buttons not showing on mobile version

I have added 3 simple PayPal buttons to my website and they work fine as long as the purchaser is on the regular view website. However, the buttons are not showing at all on the mobile version of the site (Duda)  http://www.swcogen.org/Membership.html. Is there a special step I have to do to make PayPal work on the mobile version? Thank you.