/Lists/Members/create_all has been working for months for our app. Yesterday we started getting consistent errors when calling it. I don’t think it’s an OAuth problem as we can successfully create a list prior to adding members. I’m happy that the content is “good” as we do indeed included the list_id parameter. I have also tried changing the api call to instead send the owner_screen_name and list_slug - but still the same error.
Can anyone help please?
