java.lang.NoSuchMethodError: hudson.model.Messages.ExternalJob_DisplayName()Ljava/lang/String;
	at hudson.model.ExternalJob$DescriptorImpl.getDisplayName(ExternalJob.java:132)
	at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:97)
	at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:42)
	at java.util.ComparableTimSort.binarySort(ComparableTimSort.java:258)
	at java.util.ComparableTimSort.sort(ComparableTimSort.java:203)
	at java.util.Arrays.sort(Arrays.java:1312)
	at java.util.Arrays.sort(Arrays.java:1506)
	at java.util.ArrayList.sort(ArrayList.java:1454)
	at java.util.Collections.sort(Collections.java:141)
	at hudson.ExtensionList.sort(ExtensionList.java:369)
	at hudson.ExtensionList.ensureLoaded(ExtensionList.java:289)
	at hudson.ExtensionList.getComponents(ExtensionList.java:167)
	at hudson.DescriptorExtensionList.load(DescriptorExtensionList.java:185)
	at hudson.ExtensionList.ensureLoaded(ExtensionList.java:287)
	at hudson.ExtensionList.iterator(ExtensionList.java:156)
	at hudson.ExtensionList.get(ExtensionList.java:147)
	at com.cloudbees.jenkins.GitHubPushTrigger$DescriptorImpl.get(GitHubPushTrigger.java:329)
	at org.jenkinsci.plugins.github.migration.Migrator.migrate(Migrator.java:40)
	at org.jenkinsci.plugins.github.GitHubPlugin.postInitialize(GitHubPlugin.java:39)
	at hudson.PluginManager$2$1$2.run(PluginManager.java:433)
	at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
	at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
	at jenkins.model.Jenkins$8.runTask(Jenkins.java:1011)
	at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)
	at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

WARNING: Error while serving https://ci.obiba.org/view/All/itemCategories
...
Caused by: java.lang.NoSuchMethodError: hudson.model.Messages.ExternalJob_DisplayName()Ljava/lang/String;
	at hudson.model.ExternalJob$DescriptorImpl.getDisplayName(ExternalJob.java:132)
	at hudson.model.View.doItemCategories(View.java:1058)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:320)
	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:163)
	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96)
	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:124)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)

Caused by: java.lang.NullPointerException
        at hudson.plugins.analysis.core.HealthReportBuilder.computeHealth(HealthReportBuilder.java:47)
        at hudson.plugins.analysis.core.AbstractResultAction.getBuildHealth(AbstractResultAction.java:87)
        at hudson.model.Job.getBuildHealthReports(Job.java:1122)