Hello Gabriel,
Thanks for updating the thread.
I checked the website and in dev tools I see following error message:
Failed to load resource: the server responded with a status of 404 (Not Found) https://tecnobiz.com.ar/wp-content/plugins/cornerstone/assets/dist-app/js/cs.js?ver=3.5.5
Failed to load resource: the server responded with a status of 404 (Not Found) https://tecnobiz.com.ar/wp-content/plugins/cornerstone/assets/dist-app/js/cs-vendor.js?ver=3.5.5
To fix the issue, under Plugins > Installed Plugins deactivate and delete Cornerstone. Doing so won’t delete the page you created using Cornerstone. After that visit X menu in dashboard to automatically install latest version of Cornerstone. Please make sure to clear cache to avoid any conflicts.
Let us know how it goes.
Thanks.