ArcGIS Online SAML

[VictorTey]

Hi I am working with IT to setup SAML for a client's ArcGIS online account. However I kept receving the error below.

I have been told the Name_ID is mapped correctly as shown below.  How can I debug this? I have tried using chrome saml trace tool however I do not know what I should be looking out for. Is there a way to see the actual response from SAML that caused this error?