javax.servlet.ServletException: javax.servlet.jsp.el.ELException: An error occurred while evaluating function "ls:connectedUser"

javax.servlet.ServletException: javax.servlet.jsp.el.ELException: An error occurred while evaluating function "ls:connectedUser" http://dev.libresource.org/home/community/forum/javax_servlet_ServletException_javax_servlet_jsp_el_ELException_An_error_occurred_while_evaluating_function_ls_connectedUser_ javax.servlet.ServletException: javax.servlet.jsp.el.ELException: An error occurred while evaluating function "ls:connectedUser" http://dev.libresource.org/home/community/forum/javax_servlet_ServletException_javax_servlet_jsp_el_ELException_An_error_occurred_while_evaluating_function_ls_connectedUser_/javax_servlet_ServletException_javax_servlet_jsp_el_ELException_An_error_occurred_while_evaluating_function_ls_connectedUser_ veronica 2014-12-09T10:31:00+01:00 javax.servlet.ServletException: javax.servlet.jsp.el.ELException: An error occurred while evaluating function "ls:connectedUser"

please advise.]]>