What is the context of this error? Do you see it in UI or in server.log? And when?
server logs during server startup + org.guvnor issue if I create a repository.
See uberfire/README.md at master · uberfire/uberfire · GitHub and try to provide WildFly with org.uberfire.ext.security.management.wildfly.cli.port system property assigned with correct port value.
Any example and where it need to be changed.