No peer endpoint available to which to send SAML response

[Nate Klingenstein]

I haven't come across any type of log that is showing received or discarded info.  Is there another location?

The startup process should have been explicit in exactly which metadata's getting loaded.  I'm pretty sure that Kevin stumbled on your underlying problem -- SSO entityID matches ApplicationDefaults but shouldn't in virtually all deployments -- but that's just instinct.
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