Paypal button not showing up

I have a major issue I can’t seem to fix. I’ve set up everything according to your video tutorial and guide – I’ve made a new rest api app on the paypal developer dash and input the ID and secret in the right place.

On the page you get the buy button, but when you click on it, you DON’T get the paypal buttons. I’ve tried this both with sandbox and live (currently live) and with/without terms and conditions checkbox. This is fairly urgent to fix… please help!

The link is to a post, but I’ve tried placing it just on a blank page if that was the issue, and it doesn’t make a difference. I’m on the wordpress theme themify Ultra if that makes any difference. No other ecommerce plugins or such is installed.

The page I need help with: [log in to see the link]