error setting up sp using testshib

[Michael Andrew Manske]

Trying to test SP from debian 7. Registered to testshib using metadata as described, and uploaded. Downloaded the generated config in shibboleth2.xml. When I test, I get 

Error Message: SAML 2 SSO profile is not configured for relying party

(Why is a relying party required?)

In the IdP log, I saw 'SPSSODescriptor role metadata for entityID xxx  could not be resolved’. 

Where to look first?