I created and automation but I am not sure why it didn't work?

Hi, I set up an automation for email reminders for 7 days before a due date is reached. I set up a test column but did not get the reminder and am not sure what I am doing wrong. I don't always have smartsheets open — will it still run? Attached photos showing the automation I set up.

My goal is to get auto email reminders 7 days before the due date for creating an invoice. Thanks!

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