[Resolved] Pop up does not pop up

Hello, I’ve just installed your lovely plugin but clicking on the Buy button nothing happens. The stripe popup does not open. I’ve tried on Mac, Chromebook, ipad and PC but nothing happens. There must be something simple I’m missing. I’ve used Stripe before to accept payments with Woo and that is working ok. I am using Beaver Builder plugin.
I set up a single product with a download pdf file, no coupon, no customer setup.
The button is on this page eftgathering.com/early-bird
Thank you for supporting a free plugin, Gwyneth