In order to register for Roundabout and take part in promotions, you must have a Business or Creator Instagram account, the only way to provide the company with a complete picture of the promotional results you have achieved.
During the Facebook login in app:
Select Instagram Business or Creator account
Select Facebook page
Enable ALL permissions
(in app) select an Instagram account to use in the app
(in app) complete profile registration with city selection and categories
In the case of Instagram Creator accounts, make sure that your Instagram profile is properly linked to your Facebook profile.
In case of failed login attempt:
Disable the Roundabout app from Facebook: https://www.facebook.com/help/405094243235242
Try logging in again by completing profile creation