InDesign + Smartsheet create proof

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rcraft
rcraft ✭✭
edited 06/14/22 in Add Ons and Integrations

I'm trying to create a proof within inDesign to attach to a smartsheet. I do the pages that I'd like to be made but every time I click on make a proof, I get this error message. "A required header was missing or invalid:"

Any idea where this header information can be found to put one in?

Thanks!

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