[keycloak-user] Offline Token Issue

[Shetty, Shweta]

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"
}