Error occurred when registering the device

This error occurs when the redirect URI is ‘https://c2c-eu.smartthings.com/oauth/callback’ or ‘https://c2c-us.smartthings.com/oauth/callback’. U.S. or European accounts are blocked from showing the brand, but for some reason it seems to be connecting with us or eu.
It is the ap account that tried to log in, but I wonder why the redirect uri is eu or us.