Cognos 11.1.7 OAUTH namespace throwing Failed to retrieve discovery document

[patternghost]

I am trying to setup a new namespace in Cognos Analytics 11.1.7 to allow users to login using our OAUTH setup.  I have tried both ADFS and Generic, but I cannot get past the namespace test because it throws the error "Failed to retrieve discovery document".  I can pull up a browser on that server and get to the discovery document just fine, a good looking JSON file.  But the Cognos app acts like the file doesn't exist, or it is being blocked, or something.  The logs are of no use, just repeating the same error,

Has anyone else run into this?

Thanks!