Error when trying to add Custom Field

I get the following error when clicking on Add custom field button.

Using Jira 6.1

I find this in the log file:

2013-10-25 16:35:33,434 http-bio-8080-exec-20 ERROR bjorn 995x936x1 1n12dsk 172.20.46.132 /rest/globalconfig/1/customfieldtypes [common.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service
java.lang.NullPointerException
at com.google.common.collect.Iterables.any(Iterables.java:617)
at com.atlassian.jira.projectconfig.rest.global.CustomFieldTypesResource.hasOptions(CustomFieldTypesResource.java:92)
at com.atlassian.jira.projectconfig.rest.global.CustomFieldTypesResource.getTypes(CustomFieldTypesResource.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) <+1>
at java.lang.reflect.Method.invoke(Unknown Source) <+3> (DispatchProviderHelper.java:234) (DispatchProviderHelper.java:100) (DefaultMethodInvocation.java:61)
at com.atlassian.jira.projectconfig.rest.interceptor.SecurityInterceptor.intercept(SecurityInterceptor.java:47) <+14> (DefaultMethodInvocation.java:61) (DispatchProviderHelper.java:132) (DispatchProviderHelper.java:230) (ResourceJavaMethodDispatcher.java:75) (HttpMethodRule.java:288) (ResourceClassRule.java:108) (RightHandPathRule.java:147) (RootResourceClassesRule.java:84) (WebApplicationImpl.java:1469) (WebApplicationImpl.java:1400) (WebApplicationImpl.java:1349) (WebApplicationImpl.java:1339) (WebComponent.java:416) (ServletContainer.java:537)
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:178) <+1> (ServletContainer.java:795)
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:73) <+16> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (RestServletUtilsUpdaterFilter.java:26) (RestServletUtilsUpdaterFilter.java:40) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (ContextFilter.java:25) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.mywork.client.filter.ServingRequestsFilter.doFilter(ServingRequestsFilter.java:37) <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.plugins.cors.CorsFilter.doFilter(CorsFilter.java:65) <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.prettyurls.filter.PrettyUrlsDispatcherFilter.doFilter(PrettyUrlsDispatcherFilter.java:60) <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.prettyurls.filter.PrettyUrlsSiteMeshFilter.doFilter(PrettyUrlsSiteMeshFilter.java:92) <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.prettyurls.filter.PrettyUrlsMatcherFilter.doFilter(PrettyUrlsMatcherFilter.java:56) <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.labs.botkiller.BotKillerFilter.doFilter(BotKillerFilter.java:36) <+18> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AccessLogFilter.java:103) (AccessLogFilter.java:87) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (XsrfTokenAdditionRequestFilter.java:54) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (ChainedFilterStepRunner.java:87) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66)
at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61) <+22> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (SecurityFilter.java:234) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (TrustedApplicationsFilter.java:98) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (BaseLoginFilter.java:169) (JiraLoginFilter.java:70) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66) (OAuthFilter.java:55) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:40) <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61) <+9> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AbstractJohnsonFilter.java:71) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) <+10> (UrlRewriteFilter.java:394) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (GzipFilter.java:74) (GzipFilter.java:51) (JiraGzipFilter.java:55) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66)
at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61) <+41> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (JWDSendRedirectFilter.java:25) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (ChainedFilterStepRunner.java:87) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AbstractCachingFilter.java:33) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AbstractEncodingFilter.java:41) (AbstractHttpFilter.java:31) (PathMatchingEncodingFilter.java:45) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (JiraStartupChecklistFilter.java:78) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (ChainedFilterStepRunner.java:87) (JiraFirstFilter.java:57) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (StandardWrapperValve.java:225) (StandardContextValve.java:123) (AuthenticatorBase.java:472) (StandardHostValve.java:168) (ErrorReportValve.java:98) (StandardEngineValve.java:118) (AccessLogValve.java:927) (CoyoteAdapter.java:407) (AbstractHttp11Processor.java:1001) (AbstractProtocol.java:585) (JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)