[keycloak-user] Offline Token Issue

I am using an offline token to refresh and using the following api : auth/realms/uda/protocol/openid-connect/token grant_type=refresh_token refresh_token=AAAA Basic Auth with the client credentials I am getting the following error? What does it mean to not have session? I do see active sessions in the admin dashboard on the client. What should I do to avoid getting this error ? { "error": "invalid_grant", "error_description": "Session doesn't have required client" }