Every attempt at login was met with:

You are now logged out of Jenkins, however this has not logged you out of SAML.

Have a nice day

The error shown in the log:

[WARNING ] Relay state exceeds 80 bytes: https://jenkins-zhulj-sso-cicd.apps.amp-fb3.nip.io/jenkins/securityRealm/finishLogin [ERROR ] Current assertion validation failed, continue with the next one Unauthenticated response contains an unsigned assertion [WARNING ] Unable to validate the SAML Response: Unauthenticated response contains an unsigned assertion; nested exception is org.pac4j.saml.exceptions.SAMLSignatureRequiredException: Unauthenticated response contains an unsigned assertion For more info check 'Maximum Authentication Lifetime' at https://github.com/jenkinsci/saml-plugin/blob/master/doc/CONFIGURE.md#configuring-plugin-settings If you have issues check the troubleshoting guide at https://github.com/jenkinsci/saml-plugin/blob/master/doc/TROUBLESHOOTING.md Unauthenticated response contains an unsigned assertion; nested exception is org.pac4j.saml.exceptions.SAMLSignatureRequiredException: Unauthenticated response contains an unsigned assertion