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java.lang.NullPointerException: 	at org.jenkinsci.plugins.ghprb.GhprbProjectAction.(GhprbProjectAction.java:22)	at org.jenkinsci.plugins.ghprb.GhprbTransientProjectActionFactory.createFor(GhprbTransientProjectActionFactory.java:25)	at hudson.model.AbstractProject.createTransientActions(AbstractProject.java:727)	at hudson.maven.AbstractMavenProject.createTransientActions(AbstractMavenProject.java:177)	at hudson.maven.MavenModuleSet.createTransientActions(MavenModuleSet.java:455)	at hudson.model.AbstractProject.updateTransientActions(AbstractProject.java:717)	at hudson.maven.MavenModuleSet.updateTransientActions(MavenModuleSet.java:451)	at hudson.model.AbstractProject.save(AbstractProject.java:274)	at hudson.model.AbstractItem.setDisplayName(AbstractItem.java:156)	at hudson.model.Job.doConfigSubmit(Job.java:1061)	at hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:758)	at sun.reflect.GeneratedMethodAccessor855.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:288)	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:151)	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:90)	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:111)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)	at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:583)	at org.kohsuke.stapler.Stapler.service(Stapler.java:214)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:95)	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)	at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:124)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:174)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at jenkins.security.ApiTokenFilter.doFilter(ApiTokenFilter.java:64)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)	at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:50)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:662)