Configuration as code plugin gets installed but plugin extension installation fails.

[way2awscloud]

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Description

We are trying to install configuration-as-code plugin from web GUI but unable to do it.
Jenkins version is 2.375.2
Most of the plugins installation is going as expected but when I try to install CASC plugin and restart jenkins instance.
The homepage itself throwing following error message.

java.lang.NullPointerException
at org.kohsuke.stapler.Stapler$4.convert(Stapler.java:1147)
at org.kohsuke.stapler.Stapler$4.convert(Stapler.java:1142)
at io.jenkins.plugins.casc.impl.configurators.PrimitiveConfigurator.configure(PrimitiveConfigurator.java:44)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.tryConstructor(DataBoundConfigurator.java:159)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.instance(DataBoundConfigurator.java:76)
at io.jenkins.plugins.casc.BaseConfigurator.configure(BaseConfigurator.java:266)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.configure(DataBoundConfigurator.java:82)
at io.jenkins.plugins.casc.impl.configurators.HeteroDescribableConfigurator.lambda$doConfigure$16668e2$1(HeteroDescribableConfigurator.java:277)
at io.vavr.CheckedFunction0.lambda$unchecked$52349c75$1(CheckedFunction0.java:247)
at io.jenkins.plugins.casc.impl.configurators.HeteroDescribableConfigurator.doConfigure(HeteroDescribableConfigurator.java:277)
at io.jenkins.plugins.casc.impl.configurators.HeteroDescribableConfigurator.lambda$configure$2(HeteroDescribableConfigurator.java:86)
at io.vavr.control.Option.map(Option.java:392)
at io.jenkins.plugins.casc.impl.configurators.HeteroDescribableConfigurator.lambda$configure$3(HeteroDescribableConfigurator.java:86)
at io.vavr.Tuple2.apply(Tuple2.java:238)
at io.jenkins.plugins.casc.impl.configurators.HeteroDescribableConfigurator.configure(HeteroDescribableConfigurator.java:83)
at io.jenkins.plugins.casc.impl.configurators.HeteroDescribableConfigurator.configure(HeteroDescribableConfigurator.java:55)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.tryConstructor(DataBoundConfigurator.java:151)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.instance(DataBoundConfigurator.java:76)
at io.jenkins.plugins.casc.BaseConfigurator.configure(BaseConfigurator.java:266)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.check(DataBoundConfigurator.java:100)
at io.jenkins.plugins.casc.BaseConfigurator.configure(BaseConfigurator.java:343)
at io.jenkins.plugins.casc.BaseConfigurator.check(BaseConfigurator.java:286)
at io.jenkins.plugins.casc.BaseConfigurator.configure(BaseConfigurator.java:350)
at io.jenkins.plugins.casc.BaseConfigurator.check(BaseConfigurator.java:286)
at io.jenkins.plugins.casc.ConfigurationAsCode.lambda$checkWith$8(ConfigurationAsCode.java:776)
at io.jenkins.plugins.casc.ConfigurationAsCode.invokeWith(ConfigurationAsCode.java:712)
at io.jenkins.plugins.casc.ConfigurationAsCode.checkWith(ConfigurationAsCode.java:776)
at io.jenkins.plugins.casc.ConfigurationAsCode.configureWith(ConfigurationAsCode.java:761)
at io.jenkins.plugins.casc.ConfigurationAsCode.configureWith(ConfigurationAsCode.java:637)
at io.jenkins.plugins.casc.ConfigurationAsCode.configure(ConfigurationAsCode.java:306)
at io.jenkins.plugins.casc.ConfigurationAsCode.init(ConfigurationAsCode.java:298)
Caused: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:109)
Caused: java.lang.Error
at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:115)
at hudson.init.TaskMethodFinder$TaskImpl.run(TaskMethodFinder.java:185)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:305)
at jenkins.model.J

Same was reported in #2193 but I dont see any solution there. Please help.

[Kiranksk]

i am also facing same issue in Jenkins v2.414.3.
any update

[timja]

what config are you applying?