I misunderstood.
The 'más info' Links in the IFRAME are all part of a site built and 'Powered by WPBakery Page Builder - drag and drop page builder for WordPress'.
This WP could be using a plug-in to deny X-Frame-Options access by not allowing frame ancestors.
If you have control of this site (
https://spacio4.com/) then you can remove this constraint.
It may also be failing Captcha checks.
The embedded site is calling up a shedload of assets and hacking into all this is not appropriate for TG members.
Acorn
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