I have a problem setting up SAML authentication. I'm not sure if it's a misconfiguration or a bug, but without the help of an expert, I can't get the problem solved.
As soon as I activate SAML authentication, I get the following exception on the login page:
(See full Stack Trace in attachments)
If I call up the login URL (https://idp.[CompanyName].com/idp/startSSO.ping?PartnerSpId=Jenkins.PRD:SAML2) from the SAML server directly in my browser, I get a http login request and after entering the access data correctly I am forwarded to my Jenkins (where I am successfully logged in). So basically the SAML authentication works. But unfortunately not from Jenkins directly.
I will attach all SAML settings to this ticket. I'm also attaching a recording from the Jenkins log. There I created a log recorder with the following log levels:
org.jenkinsci.plugins.saml -> FINEST.
org.pac4j -> FINE.
I hope someone can help me identify the problem.