Has anyone had problems getting the list of regions from graph.facebook.com/v2.9/?

Question

Facebook

Colleagues, I'm doing integration with the FB ADS API, I ran into such a situation...
I'm making a request to get a list of US regions on

https://graph.facebook.com/v2.9/search?access_token=<<TOKEN>>&type=adgeolocation&location_types=%5B%22region%22%5D&q=a&country_code=US

From a regular user, the request goes through and the data arrives normally, as expected. From the application's test user, this request returns a void.
Moreover, a similar request for obtaining a list of US cities on

https://graph.facebook.com/v2.9/search?access_token=<<TOKEN>>&type=adgeolocation&location_types=%5B%22city%22%5D&q=a&country_code=US

passes normally from any user and the data arrives as expected.
Actually a question, whether who faced similar nonsense and how struggled?

Answer 1

The Marketing API does not work correctly with test users.