[satosa-users] configuration error: unknown system entity

Dear all, I am currently trying to set up a saml2-saml2 proxy and have come to an impasse: It seems that I have incorrectly/incompletely set up the frontend. When trying to log in satosa logs  "configuration error: unknown system entity <entityID of SP>". I thought the entityID would be set in the frontend plugin configuration through config.idp_config.metadata.local = <file containing SP metadata>. Do I have to set the SP entityID somewhere else? Thank you for your help! Best regards, Jonas Schwab