SSO issues with firefox

[fockarty]

I configured SSO which works in chrome but in firefox i get the error below.. Anyone know where this comes from?

AADSTS75011: Authentication method 'X509, MultiFactor, X509Device' by which the user authenticated with the service doesn't match requested authentication method 'Password, ProtectedTransport'. Contact the Uyuni application owner.

Adding X509, MultiFactor, X509Device to java.sso.onelogin.saml2.security.requested_authncontext = urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport

ends up with:
AADSTS7500522: XML element 'AuthnContextClassRef' in XML namespace 'urn:oasis:names:tc:SAML:2.0:assertion' in the SAML message must be a URI.