Why do I get an 'Invalid Client' error when I try to generate a refresh token and provide it as an input to the connectors?

In Catalyst Connectors, this error will occur if you try to generate the token with the auth URL domain for a different data center (DC) other than your Catalyst account’s DC. You must ensure that you have generated the grant token (code), refresh_token and access_token for the same DC as your account.