The Clever Portal SSO link initiates an authorization through Clever. Since we need to initiate the Auth0 authorization flow the Clever app callback (must be the first one in the URI list) should point to a web route (e.g. your application) that initiates a redirect to the Auth0 Clever SSO authorization flow (e.g. /authorize?connection=Clever-Connection-Name). This has been verified by Clever support.