can't run speed test or install mcafee antivirus

this is the message I get when I try to run spped test or install Mcafee security program description The server encountered an internal error () that prevented it from fulfilling this request. exception java.lang.NullPointerException com.cox.chsi.app.Authenticator.addRoles(Authenticator.java:442) com.cox.chsi.app.Authenticator.getUser(Authenticator.java:312) com.cox.chsi.app.Authenticator$Proxy$_$$_WeldClientProxy.getUser(Authenticator$Proxy$_$$_WeldClientProxy.java) com.cox.chsi.app.PageRestrictFilter.doFilter(PageRestrictFilter.java:138) com.cox.chsi.app.HttpRequestDebugFilter.doFilter(HttpRequestDebugFilter.java:95) note The full stack trace of the root cause is available in the JBoss Web/7.0.16..Final-redhat-1 logs.