@litmusapp Not to worry. The errors were ours. Interacting with the email was key to finding them. Thus, mailchimp. Thanks for the concern.
Used Litmus.com to test an HTML email. Sent tests with Mailchimp. Luckily we did, because it had errors that Litmus didn’t show.
@concrete5 You’re going to need to update your “Concrete-ize” page/video to include the footer_required call for 5.5. goo.gl/L8qV2