Typically this means the tomcat container for James and the search service are not running.
You can restart this with the commands shown below. You may need to set the JAVA_HOME environment variable to the location of your JDK.
sh /opt/collabnet/teamforge/dist/james/james-2.2.0/bin/phoenix.sh stop sh /opt/collabnet/teamforge/dist/james/james-2.2.0/bin/phoenix.sh start