I believe that’s the doing of the tool, I just got a SAML assertion issued from Auth0 to a service provider and if I decode the assertion using just a Base64 decoder I see that the XML is all in a single-line with no line breaks.
The above seems to point the underlying root cause is something else entirely; I would recommend to check if the service provider as any sort of additional logging that could be used to obtain more information. In particular, finding which would be the issuer that the service provider was expecting or if there’s any other reason for throwing such an error.
For example, a Google search mentions that error here and the root cause has nothing to do with the SAML identity provider and more just a timeout imposed by the service provider.
has been reported that FIM 3.1.2 has issues handling authentication request that take longer then 5 minutes to complete. If a end user takes longer than this time to provide its credential, the authentication attempt will fail.
(…)
Unable to process the Response message, com.rsa.fim.exception.ProfileException: The SAML Response issuer is not the same entity to whom the corresponding request was sent