SAML auth error after last update: The InResponseTo attribute

I have a SAMLP Identity Provider connection that is throwing the following error:
“The InResponseTo attribute does not match the id in the AuthNRequest”

I don’t have many users using this connection, so I only caught it today. But I think the SAML connection configuration was recently updated and that may have caused it.

I have no idea how to troubleshoot that or what is wrong indeed. Could you help me?


I discovered what was the problem.

When we updated our code to use Custom Domains, the domain and the audience were pointing to a different URL when comparing to the URL that the SAML authenticator system was expecting.

So, my login page was on and the SAML authenticator was redirecting to