[satosa-users] Saml2 backend returning "Couldn't find the page you asked for!"

I've got SATOSA running with mod_wsgi I'm trying to use OIDC on the frontend and SAML2 on the backend, and I think that I have the SAML stuff misconfigured. Acc'd to /satosa/.well-known/openid-configuration, my OIDC authorization endpoint is https://satosa.example.org/satosa/Saml2/OIDC/authorization but any attempt to interact with that URL returns a 404. The OIDC frontend stuff seems to be working - visiting the URLs with various (in)appropriate requests generates responses. Do I need to do something in addition to setting BASE in proxy_conf.yaml to get SATOSA's routing to work through URLs that aren't immediately off the server root? thanks Liam