You did not state your Identity Provider, but this error usually occurs if there is a problem with the certificate or if encryptAssertions is enabled. If still having problems, let us know what Idp you are using.
Hello,
I am having this same problem when using Okta IDP.
Do you have a step by step guide on setting up integration woth Okta?
thanks
PS: I am on a trial account
Hello Thomas, I Have the same problem , I am using ADFS as a IDP provider.
Did anyone find a solution to this? I am getting the same error using CA's SSO solution as an identity provider.