Welcome to the Community, @Joe206!
Ah, I think I can see what the issue is. The Email field has the Customer Name field selected which is blank (“No data”), so it’s not passing any value for the email address of the Zoom registrant.
To fix that, try moving that Customer Email (Stripe) field to the Email (Zoom) field instead:
Then move the Customer Name field over to the Last Name field, as it looks like Stripe doesn’t send over the first and last name in separate fields. You could also use a Formatter (Text > Split Text) action to split the first and last name out into separate fields that you can select for the First Name and Last Name fields. More information on how to do that is available in the example in this guide: Find, replace, or split special characters
What you’ll also want to do is change the selected test sample from Stripe so that the Customer Name field has a value. Otherwise when you test the Create Meeting Registrant action again it will error again as the First Name and Last Name fields are also required fields, so they require a value.
Hope that helps to fix things here. Please keep us updated on how that goes!