Refused to display 'http://simplepriceprep.webflow.io/' in a frame because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'self' https://*.webflow.com http://*.webflow.com http://*.webflow.io http://webflow.com https://webflow.com".
You’re trying to show your website simplepriceprep.webflow.io on your domain, but Webflow doesn’t allow to use iframes to show websites hosted on webflow.io domains.
See: http://simplepriceprep.webflow.io/ this one works well, but www.simplepriceprep.com not because your code:
<frameset rows="100%,*" border="0">
<frame src="http://simplepriceprep.webflow.io" frameborder="0" />
<frame frameborder="0" noresize />
</frameset>
tries to show webflow website in an iframe. Why don’t you link your domain into Webflow?