Adding contacts n a basic account

Hi,

I  have a basic Zoom account and would like to add a family member who does not have a zoom account.  She has an email id, but when I add her email address from the client, she does not get a email showing my invitation. 

Is there a setting that I need to update or does she need to have a zoom account to accept my invitation?

Any assistance provided would be great. 

Thanks

Mehir