3697601 - During IDP-initiated SAML2 authentication, error "SAML2.0: No RelayState mapping found for RelayState value <value>"

From Identity Provider's (IDP) page, a tile to an application is clicked. When redirected to Service Provider's (SP) URL, the following error appears:

SAML2 service not accessible
What has happened?
Calling of URL <hostname> was terminated during SAML2 processing
Note
No RelayState mapping found for RelayState value <value>

This RelayState value is the same that was set on IDP configuration page, such as an application path or the complete URL to the application.

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

• ABAP platform
• SAP NetWeaver
• SAP S/4HANA

IDP-initiated, SAML2, relay state mapping, no mapping found, SAML2 service not accessible, identity provider, authentication error, was terminated during SAML2 processing , KBA , BC-SEC-LGN-SML , SAML 2.0 for ABAP , Problem