Never received an email

Hello, I’ve set up two forms using this plugin, and while I can see that they work correctly (I can see a few form entries in the plugin settings), I never received an email that include the form content to my email address entered inside my general WP settings. How could I make Nex-Form send an email every time someone fill the form?

https://www.ads-software.com/plugins/nex-forms-express-wp-form-builder/