Failed to Single Sign On Authentication, it is possible that SAML is not configured or there are errors in the configuration. (Authentication, Certificates, SAML 2.0, SSO Auth)
Single Sign-On (SSO)
SSO Setup Guides: Login Error Codes by SSO Type – Handshake Help Center
User fail to login to Split using SAML SSO integration, error returned 405, 403 or 475 errors – Split Help Center
SAML Authentication - SDP help desk guide
I can't log in via SSO – Miro Help Center
G Suite SAML and SSO - "We can't log you in" - Salesforce Developer Community
authentication - Unable to implement SSO in Salesforce - Stack Overflow
We can't log you in. Check for an invalid assertion in the SAML Assertion Validator (available in Single Sign-On Settings) or check the login history for failed logins – InfallibleTechie
Azure single sign-on SAML protocol - Microsoft Entra | Microsoft Learn
CPE web page error: Single Sign-On Error - (ISC)² Community
Set up single-sign on with SAML – Zapier
Common Issues with SAML Authentication
Error - "Login Failed: SSO Reason: No SAML Signature" : Authentic8 Support
Error: Google SSO failed 403 | Smartsheet Learning Center
Solved: Jira SAML Sign-On Failed
The Challenge of Building SAML Single Logout | Official Products & Services for IdentityServer
Sophos Central Partner: Single Sign-On error message when logging on to the Partner portal
Configure SAML single sign-on – Support Center
Error 4330 Failed to sign on: Unable to Verify SAML Assertion signature - Progress Community
Solved: Cisco AnyConnect with Azure Single Sign-On failing with problem retrieving SSO cookie - Cisco Community
