Jive Forums 2.1.2
The following error occurred. If you believe it to be a bug, please report it in the Jive support forums at: http://www.jivesoftware.com/community/ 
    java.lang.NullPointerException
	at java.net.URLEncoder.encode(URLEncoder.java:188)
	at java.net.URLEncoder.encode(URLEncoder.java:154)
	at _jsp._login__jsp._jspService(_login__jsp.java:523)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:60)
	at com.caucho.jsp.Page.pageservice(Page.java:570)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:159)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:163)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:208)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:259)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:363)
	at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:490)
	at com.caucho.util.ThreadPool.run(ThreadPool.java:423)
	at java.lang.Thread.run(Thread.java:613)