Trigger To Close Lightbox Not Working

Hi Team!
I am attempting to use a lightbox for the first time ever...hooray!
The lightbox opens correctly when triggered. I have a trigger set to close lightbox when timeline reaches 10 seconds. It does not close on its own though. I still have to use the X.

Do lightboxes only close using the X or can we use triggers to close them?
Thanks in advance!

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