The HTTP 500 error appears as follows:
HTTP 500 - Internal server error occurred. Please contact your system administrator.
org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/jsp/modules/system/errorPage.jsp at line 84
81: } %>
82:
83: <div id="stepDisplay">
84: <c:if test="${not empty flowExecutionKey}">
85: <input type="hidden" name="_flowExecutionKey" value="${flowExecutionKey}"/>
86: </c:if>
87: <c:if test="${not empty param.parentFlow}">
In the jasperserver log (located on the UMP server at \Nimsoft\probes\service\wasp\webapps\jasperserver-pro\WEB-INF\logs\jasperserver-pro.log) you will also see the following exception:
Caused by: java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:941)
at org.apache.jsp.WEB_002dINF.jsp.modules.system.errorPage_jsp._jspx_meth_c_005fif_005f0(errorPage_jsp.java:1131)
at org.apache.jsp.WEB_002dINF.jsp.modules.system.errorPage_jsp._jspService(errorPage_jsp.java:281)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)