SSO authentication failed with the error 'Could not validate SAMLResponse'DescriptionWhen anyone is attempting to access the instance user receive an error 'Could not validate SAMLResponse' followed by 'You are successfully logged out' Release or EnvironmentAllCauseThis is a common message appears when SAML Validation fails during SSO authentication. This validation failure could be due to many reasons.ResolutionKindly check the SSO debug logs to better understand the actual cause of SAML validation failure and use Multi-SSO (SAML 2.0) errors and fixes from ServiceNow docs as a reference.