[keycloak-user] NoSuchMethodError: org.keycloak.models.KeycloakSession.userCache()

Running the "authenticator" example provider in RedHat SSO 7.1. The provider (Secret Question) comes up in the admin console, and I'm able to make it a required action as part of the registration flow. When going through the registration process in the browser, the security question page is rendered (security-question-config.ftl) but submitting the security answer leads to exception below: org.jboss.resteasy.spi.UnhandledException: java.lang.NoSuchMethodError: org.keycloak.models.KeycloakSession.userCache()Lorg/keycloak/models/cache/UserCache; Any thoughts on how to resolve?