美好的一天，
我试图在我们的新Jenkins实例上设置Multibranch管道，我在Scan Multibranch Pipeline Log中遇到了这个错误：
No such file: E:\Continuous Integration\Jenkins\jobs\Enhanced-API\indexing\indexing.log
根据jenkins.err.log，我遇到了一个
WARNING: Caught exception evaluating: h.filterDescriptors(it,attrs.descriptors) in /view/EAPI/job/Enhanced-API/configure. Reason: java.lang.NullPointerException: Descriptor list is null for context 'class org.jenkinsci.plugins.workflow.multibranch.WorkflowMultiBranchProject' in thread 'Handling GET /view/EAPI/job/Enhanced-API/configure from 10.117.100.110 : RequestHandlerThread[#35] AbstractFolder/configure.jelly FolderLibraries/DescriptorImpl/config.jelly LibraryConfiguration/config.jelly SCMRetriever/DescriptorImpl/config.jelly MultiSCM/DescriptorImpl/config.jelly' java.lang.NullPointerException: Descriptor list is null for context 'class org.jenkinsci.plugins.workflow.multibranch.WorkflowMultiBranchProject' in thread 'Handling GET /view/EAPI/job/Enhanced-API/configure from 10.117.100.110 : RequestHandlerThread[#35] AbstractFolder/configure.jelly FolderLibraries/DescriptorImpl/config.jelly LibraryConfiguration/config.jelly SCMRetriever/DescriptorImpl/config.jelly MultiSCM/DescriptorImpl/config.jelly' at hudson.model.DescriptorVisibilityFilter.apply(DescriptorVisibilityFilter.java:73) at hudson.Functions.filterDescriptors(Functions.java:1863) at sun.reflect.GeneratedMethodAccessor293.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.commons.jexl.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:258) at org.apache.commons.jexl.parser.ASTMethod.execute(ASTMethod.java:104) at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:83) at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57) at org.apache.commons.jexl.parser.ASTReferenceExpression.value(ASTReferenceExpression.java:51) at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80) at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:74) at org.apache.commons.jelly.tags.core.CoreTagLibrary$3.run(CoreTagLibrary.java:134) at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95) at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
这个Jenkins的版本是 2.85 ，带有以下版本的Git插件：
Git客户端插件 - 2.5.0
Git插件 - 3.6.0
GIT服务器插件 - 1.7
GitHub API插件 - 1.89
GitHub分支源插件 - 2.2.3
GitHub插件 - 1.28.0
我们为什么遇到这个问题的任何想法？谢谢！