[Building Sakai] Sitestats error

[Kowalski, Peter J]

Hello,
I'm running Sakai 2.8.1 and have successfully built sitestats 2.2.1. I've given the maintain role sitestats.view permissions, but when I go into a site to test it out, I get the following error:

org.sakaiproject.portal.api.PortalHandlerException: org.apache.wicket.WicketRuntimeException: Can't instantiate page using constructor public org.sakaiproject.sitestats.tool.wicket.pages.OverviewPage(org.apache.wicket.PageParameters) and argument panel = "Main"
    at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:862)
caused by: org.apache.wicket.WicketRuntimeException: Can't instantiate page using constructor public org.sakaiproject.sitestats.tool.wicket.pages.OverviewPage(org.apache.wicket.PageParameters) and argument panel = "Main"
    at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:89)
caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
caused by: java.lang.NoSuchMethodError: org.sakaiproject.sitestats.api.StatsManager.isEnableSitePresences()Z
    at org.sakaiproject.sitestats.tool.wicket.widget.VisitsWidget.<init>(VisitsWidget.java:72)
    at org.sakaiproject.sitestats.tool.wicket.pages.OverviewPage.renderBody(OverviewPage.java:88)
    at org.sakaiproject.sitestats.tool.wicket.pages.OverviewPage.<init>(OverviewPage.java:56)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at org.apache.wicket.session.DefaultPageFactory.createPage(DefaultPageFactory.java:182)
    at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:89)
    at org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:278)
    at org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:293)
    at org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:210)
    at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)
    at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1239)
    at org.apache.wicket.RequestCycle.step(RequestCycle.java:1316)
    at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1418)
    at org.apache.wicket.RequestCycle.request(RequestCycle.java:532)
    at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:356)
    at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:124)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:659)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:457)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:359)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
    at org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:511)
    at org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1429)
    at org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:204)
    at org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:96)
    at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:862)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:659)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:843)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:679)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1293)
    at java.lang.Thread.run(Thread.java:662)



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