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SSO Troubleshooting: Invalid SAML Response

Learn how to troubleshoot the Invalid SAML Response error.

Error

If during SSO, you see an error message saying:
 
Invalid SAML Response. Not match the saml-schema-protocol-2.0.xsd
 

Explanation

 This means the SAML Response is not formatted correctly.
 

Resolution

 To troubleshoot this, do the following:
  1. Capture the SAML Response using SAML Tracer or another tool.
  2. Go to a XML schema validator site like: https://www.freeformatter.com/xml-validator-xsd.html
  3. Enter the SAML Response in the XML field
  4. Enter the SAML 2.0 schema XSD from https://docs.oasis-open.org/security/saml/v2.0/saml-schema-assertion-2.0.xsd (“view source” in browser to get the raw text) in the XSD field
  5. Run the validation check and examine the errors.
  6. Correct the formatting in the SAML Response based on what the errors highlight.