Email Notifications not working

and I am getting my own notifications

Another issue on my test site. There does not appear to be any recipients on the email notification. This message in FluentSMTP.

{
  "code": 400,
  "message": "The to array is required for all personalization objects, and must have at least one email object with a valid email address.",
  "errors": [
    "The to array is required for all personalization objects, and must have at least one email object with a valid email address."
  ]
}