Hi there,
Based on the error for your site in our debugger at https://tools.jetpack.com/debug/?url=https://aricapallets.cl/, it appears that something is blocking some connections Jetpack needs in order to work correctly. That is why the modules list isn’t working.
Please contact your hosting provider and ask them to check their security logs for any blocked requests to the /wordpress/xmlrpc.php file on your site, using the Jetpack by WordPress.com user agent.
If they say Jetpack has to be whitelisted on their end, you can provide them with the IP addresses at https://jetpack.com/support/hosting-faq/
However, please note that these IP addresses could change (or more could be added) at any time. This is one of the reasons why we discourage whitelisting specific IPs.
The contact form on the page you linked to is a Mailchimp form, not the Jetpack contact form. Please contact support for the Mailchimp plugin you’re using for help with why that form won’t load.