Alert Someone automation unable to run

I have a pretty simple automation built that is set to email a specific email address when a value in a certain column changes.

It states that it is unable to run because "this action has no recipients that will be able to receive notifications based on this sheets permission settings or this accounts approved domain sharing list".

I don't understand why I would be getting this message because the email address that the notification should be sending to is a licensed Smartsheet user for our workspace. Any ideas?