Quote Originally Posted by lat9 View Post
See this (https://github.com/lat9/one_page_checkout/issues/165) GitHub issue; let me know if that corrects the issue when a store doesn't have ot_gv enabled.

There was a change made for zc156 such that an empty array (instead of false) is being returned in that case, that's what the change for that issue addresses.
Thanks. I've applied the change and will check back to see if the error goes away.