brine-template Automation not working

Hi,

I have an automation email set to send whenever a subscriber joins one of my marketing lists. It shows as active. However, over the past two weeks whenever I add someone to this marketing list, no email goes out. I've added about 10 new subscribers, but 0 automation emails have been sent, even though it says they are actively being sent.

Any thoughts or help on this? Does the automation not work if I manually add the subscriber info? If so, its completely useless.