Hi,
When we click in "Clone project" this response is returned:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><status><status-code>500</status-code><message>Rank index was requested before the plugin was upgraded fully</message><stack-trace>com.atlassian.greenhopper.service.rank.RankException: Rank index was requested before the plugin was upgraded fully
 at com.atlassian.greenhopper.service.rank.RankIndexServiceImpl$RankIndexSupplier.get(RankIndexServiceImpl.java:408)
 at com.atlassian.greenhopper.service.rank.RankIndexServiceImpl$RankIndexSupplier.get(RankIndexServiceImpl.java:388)
 at com.google.common.base.Suppliers$MemoizingSupplier.get(Suppliers.java:109)
 at com.atlassian.greenhopper.service.rank.RankIndexServiceImpl.getIndex(RankIndexServiceImpl.java:385)
 at com.atlassian.greenhopper.service.rank.RankIndexServiceImpl.fetchCreate(RankIndexServiceImpl.java:348)
 at com.atlassian.greenhopper.service.rank.RankIndexServiceImpl.getIssuePosition(RankIndexServiceImpl.java:80)
 at com.atlassian.greenhopper.customfield.rank.RankCFType.getValueFromIssue(RankCFType.java:43)
 at com.atlassian.jira.issue.fields.CustomFieldImpl.getValue(CustomFieldImpl.java:437)
 at com.metova.jira.clone.project.rest.ProjectCloneResource.cloneIssues(ProjectCloneResource.java:238)
 at com.metova.jira.clone.project.rest.ProjectCloneResource.cloneProject(ProjectCloneResource.java:108)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:483)
 at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
 at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
 at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
 at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
 at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
 at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
 at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
 at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
 at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)
 at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)
 at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
 at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
 at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
 at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
 at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:178)
 at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:795)
 at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:73)
 at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:78)
 at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
 at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)
 at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)
 at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:78)
 at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
 at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:70)
 at com.atlassian.plugins.rest.module.servlet.RestServletUtilsUpdaterFilter.doFilterInternal(RestServletUtilsUpdaterFilter.java:26)
 at com.atlassian.plugins.rest.module.servlet.RestServletUtilsUpdaterFilter.doFilter(RestServletUtilsUpdaterFilter.java:40)
 at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:78)
 at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
 at ...
Can you help us to solve?