Hello Jenkins Community team, I am using *Jenkins - 2.263.1(LTS)* deployed through tomcat.
I have upgraded few of the plugins yesterday since then i am facing following issue whenever i modify any settings under *Manage Jenkins* --> *Configure Systems* section if i click save button. it takes few mins and throws the below error. HTTP Status 403 – Forbidden Type Status Report Message No valid crumb was included in the request Description The server understood the request but refuses to authorize it. Apache Tomcat/9.0.30 >From jenkins systems log below message shown. Feb 18, 2021 7:52:13 AM WARNING hudson.ExpressionFactory2$JexlExpression evaluate Caught exception evaluating: h.filterDescriptors(it,attrs.descriptors) in /jenkins/configure. Reason: java.lang.NullPointerException: Descriptor list is null for context 'class hudson.model.Hudson' in thread 'Handling GET /jenkins/configure from 206.25.26.27 : http-nio-8080-exec-2 Jenkins/configure.jelly GlobalLibraries/config.jelly LibraryConfiguration/config.jelly SCMRetriever/DescriptorImpl/config.jelly MultiSCM/DescriptorImpl/config.jelly' java.lang.NullPointerException: Descriptor list is null for context 'class hudson.model.Hudson' in thread 'Handling GET /jenkins/configure from 206.25.26.27 : http-nio-8080-exec-2 Jenkins/configure.jelly GlobalLibraries/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:2122) at sun.reflect.GeneratedMethodAccessor308.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) Under *Configure Global security --> CSRF Protection -->Enable proxy compatibility*(Enabled). Still same problem persists. Therefore please help me to solve this issue. Thanks in advance. -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/5813788e-3157-45f5-b2d4-f906b3ce8228n%40googlegroups.com.