WARNING: #{336} [SamlSSOAssertion.validateResponse] Error in consuming saml response net.shibboleth.utilities.java.support.logic.ConstraintViolationException: Signature cannot be null
or
The SAML authentication request issued by
The SAML certificate configuration is missing signing options in the Identity Provider
Edit the Signing Options for the Entity Provider to select Sign SAML response and assertion.
Microsoft EntraID Example:
https://www.veritas.com/content/support/en_US/article.100065083.html