When the user tries to log on with SAML or by refreshing the session, they see the InResponseToField of Response doesn‘t correspond to the sent message error.
This error occurs when handling an authentication response without a known corresponding request; for example, as the consequence of a session timeout. The timeout is a safeguard for performance and security reasons.
Ensure that the user login is within the timeframe of 15 minutes.
The identity provider may be out of sync; or if it consistently takes a long time to issue the authentication response, reduce this time and check.
Check the audit log for the AuthnRequest expired - ID: <RequestId> Destination: <IdPDestination> error. If you find this error message, refer to AuthnRequest expired - ID: <RequestId> Destination: <IdPDestination>.
For more information about the audit log, refer to Auditing and Logging Information for SAP Authorization and Trust Management Service - SAP Help Portal.