Include pdf in email to myself

I would like to attach the PDF of forms submitted when I receive notifications. I've applied the pdf command in the email, but I can't get it to work. Is there a setting I am missing?

Thank you for contacting us.

The PDF Attachment option seems to be disabled on your email notification at the moment. Please switch it from No to Yes via email notification settings and then test the form again.

If you need any further assistance on this, please let us know.