Difficulty using the notify.alexa_media player service with paramaters

I am a bit of a newb and I am struggling with an alexa notification.

I am trying to have a notification that reminds me to close the door, and how long it has been open. I have all of that working with the exception of Alexa announcing the length of time it has been open. When I send this alexa just says “The door has been open for Minutes” without saying the number of minutes.

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