Is your success confirmation message not visible? Seeing this error:
Unexpected token S? If you are using the Easy WP SMTP wordpress plugin, you may have an issue with your contact form 7 plugin.
If the form is not loading the response message box but is still sending the data via email (the ajax loader keeps spinning but nothing is happening????)…. Check out your WP SMTP settings and turn off debug mode, yup! Should fix all of your problems!