Hey gemmayoungman !
Awesome! Thanks for letting me know and no problem! 🙂
When a site is deployed and is being visited by vitors, we're caching quite some data to deliver content all across the world within milliseconds and make sure to backend doesn't get overloaded. This means, when you make a change, it can take a minute before they're visible on your site.
In this case, our CDN cached a result from a domain that wasn't allowed to load in Buttonizer (perhaps it was when the development domain was still set up?). So I made sure the domain was set up propperly (which it was) and force-cleared the cache for your widget on our side, so on the next request the cache will be refilled with the correct result.
Unfortunately it was a bug on our side. However, it's good to know that the issue would resolve itself since the cache will expire eventually 🙂