As a widget this plugin is not working.
I tried the solution here deactivating/reactivating all plugins
Still not sending confirmation via email.
Not only that but any logged in user can subscribe any email address and still get a "Your subscription has been successfully created!" message even if I enter random text in the box. It does not actually subscribe the email address but you still get that message prompt.
Would love to get this working properly
The client ask me not to show their website yet but any other request I can try and accommodate.