Hey Alex,
first of all, thank you for the purchase!
This is indeed a bug, my apologies; it only occurs when the “Promo test” has not been set in the Theme Options panel, thus the theme demo doesn’t have it. In order to eliminate the problem, please download this archive from my repository, unzip it, and upload the contained file into the theme folder (wp-content/themes/Origami/), replacing the existing file.
Please let me know if it works!
Sincerely,
Andrew / Satori Studio