@superbolt Yep - that’s a strange error!

I'm going to flag this post for the Zapier Community Team. They should have more insight on this and can escalate to the support team if needed.

Sit tight, and someone will contact you soon.

Hey @superbolt, thanks for reaching out about this! 

Sorry to see you’re running into that unhelpful error here! It looks as though the data being used for the test seems to be a default sample from Facebook Lead Ads. So my first thought here is that this might be a validation issue of some kind where one of the fields in Gravity Forms received a value it wasn’t expecting. It might be worth pulling in a real sample from Facebook Lead Ads to retest the Gravity Forms step with. 

If that doesn’t do the trick, I’d recommend reaching out to Support Team to look into this further. You can reach them via the the Get Help form.

Hope that helps! :)