Billing Region Error

[KoolerMediaPro]

I’ve extensively tested this issue and reached out to the Keap Community for help.

I'm struggling to find a solution for forms.

Since I've heard from other Keap Users having this issue, it seems like this is something bigger than I can solve alone. Honestly, this is an active ticket for both Keap API Engineers and Zap Developers. However, I haven't seen any updates or resolutions on this matter from either of the providers.

Here are my findings on where the errors occur:
JavaScript lookup and replace
Zapier Email Parser to new App directly
WPForms with new Zapier App
Gravity Forms with new Zapier App
Google Sheet Lookup Table - Changing the form to a dropdown with the Alpha-2 codes for the region and the Alpha-3 codes for the Country (The test run didn't work, and I was still working on a massive Alpha-2 code list as there isn't one pre-made for all of what we need.)
If you enter the full state name and country name, you will get the same error: the Billing Region Code is missing.
Keap native Form—I tried to use this form, but it doesn't have the best Spam filter.
Keap Developer App - Direct API Connector - Still had the Billing Region Code Missing Error.

The full thread regarding this issue, which initially appeared in 2017, was resolved and resurfaced within the past few months. It could be a consequence, but Keap is also making many updates to bring Keap Ultimate to the fold. https://integration.keap.com/t/invalid-country-code-and-region-what-is-valid/13354/5

Is there a known fix to this? Or something I may be missing?