Creating a filter causes an error

We have a brand new installation. When I click on the "Create new filters" button on the default dashboard I get an error (below).
The dashboard has the following default portlet:
Saved Filters (Create New | Manage Filters)
You have no saved filters at the moment. Create new filters.

Note that if I click on "Create New" I don't get an error - it takes me to
jira/secure/IssueNavigator.jspa?createNew=true&mode=show

but when I click on "Create new filters" it takes me to
/jirasecure/req.contextPath/secure/IssueNavigator.jspa?mode=show&createNew=true
with this error:

Could not execute action [req.contextPath]:Action 'req.contextPath' not found or could not be initialized: java.lang.ClassNotFoundException: req.contextPath

java.lang.IllegalArgumentException: Action 'req.contextPath' not found or could not be initialized: java.lang.ClassNotFoundException: req.contextPath
at webwork.action.factory.JavaActionFactory.getActionImpl(JavaActionFactory.java:64)
at webwork.action.factory.ScriptActionFactoryProxy.getActionImpl(ScriptActionFactoryProxy.java:54)
at webwork.action.factory.XMLActionFactoryProxy.getActionImpl(XMLActionFactoryProxy.java:54)
at webwork.action.factory.PrefixActionFactoryProxy.getActionImpl(PrefixActionFactoryProxy.java:102)
at webwork.action.factory.JspActionFactoryProxy.getActionImpl(JspActionFactoryProxy.java:53)
at webwork.action.factory.CommandActionFactoryProxy.getActionImpl(CommandActionFactoryProxy.java:62)
at webwork.action.factory.AliasingActionFactoryProxy.getActionImpl(AliasingActionFactoryProxy.java:96)
at webwork.action.factory.CommandActionFactoryProxy.getActionImpl(CommandActionFactoryProxy.java:62)
at webwork.action.factory.ContextActionFactoryProxy.getActionImpl(ContextActionFactoryProxy.java:36)
at webwork.action.factory.PrepareActionFactoryProxy.getActionImpl(PrepareActionFactoryProxy.java:37)
at webwork.action.factory.ParametersActionFactoryProxy.getActionImpl(ParametersActionFactoryProxy.java:46)
at webwork.action.factory.ChainingActionFactoryProxy.getActionImpl(ChainingActionFactoryProxy.java:52)
at webwork.action.factory.DefaultActionFactory.getActionImpl(DefaultActionFactory.java:125)
at webwork.action.factory.ActionFactory.getAction(ActionFactory.java:63)
at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:119)
at com.atlassian.jira.web.dispatcher.JiraServletDispatcher.service(JiraServletDispatcher.java:186)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)
at com.atlassian.jira.web.filters.SitemeshExcludePathFilter.doFilter(SitemeshExcludePathFilter.java:38)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:168)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.atlassian.seraph.filter.LoginFilter.doFilter(LoginFilter.java:177)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:132)
at com.atlassian.jira.web.filters.ProfilingAndErrorFilter.doFilter(ProfilingAndErrorFilter.java:25)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.atlassian.jira.web.filters.ActionCleanupDelayFilter.doFilter(ActionCleanupDelayFilter.java:37)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.atlassian.johnson.filters.JohnsonFilter.doFilter(JohnsonFilter.java:91)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.atlassian.jira.web.filters.gzip.GzipFilter.doFilter(GzipFilter.java:72)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:36)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6356)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)