https://userapps.support.sap.com/sap/support/knowledge/en/3533018
3533018 - Unable to Log In to SAP SuccessFactors via Single Sign-On (SSO) - Error Message:...
An error occurs when attempting to log in to the SAP SuccessFactors Platform using Single Sign-On (SSO). The error message displayed is...
unable to log insingle sign on sso