I have tried disabling security, but still same error after service restart.

1. 1. service jenkins start
      Job for jenkins.service failed because a timeout was exceeded.
      See "systemctl  status jenkins.service" and "journalctl  -xe" for details.
       
      Tried copying latest plugin(https://plugins.jenkins.io/matrix-auth/), but still jenkins did not load.
       
      Error : 
       
      com.thoughtworks.xstream.mapper.CannotResolveClassException: hudson.security.ProjectMatrixAuthorizationStrategy at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:81) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125) at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:55) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125) at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAliasingMapper.java:88) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125) at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:79) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125) at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:74) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125) at com.thoughtworks.xstream.mapper.SecurityMapper.realClass(SecurityMapper.java:71) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125) at hudson.util.XStream2$CompatibilityMapper.realClass(XStream2.java:411) at hudson.util.xstream.MapperDelegate.realClass(MapperDelegate.java:46) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:125) at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:47) at hudson.util.RobustReflectionConverter.determineType(RobustReflectionConverter.java:523) at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:348) Caused: jenkins.util.xstream.CriticalXStreamException: ---- Debugging information ---- cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException cause-message : hudson.security.ProjectMatrixAuthorizationStrategy class : hudson.model.Hudson required-type : hudson.model.Hudson converter-type : hudson.util.RobustReflectionConverter path : /hudson/authorizationStrategy line number : 12 version : not available ------------------------------- at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:383) at hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:291) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:74) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:68) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:52) at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:136) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1421) at hudson.util.XStream2.unmarshal(XStream2.java:189) at hudson.util.XStream2.unmarshal(XStream2.java:160) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1399) at hudson.XmlFile.unmarshal(XmlFile.java:196) Caused: java.io.IOException: Unable to read /home/jenkins/config.xml at hudson.XmlFile.unmarshal(XmlFile.java:199) at hudson.XmlFile.unmarshal(XmlFile.java:179) at jenkins.model.Jenkins.loadConfig(Jenkins.java:3297) at jenkins.model.Jenkins$12.run(Jenkins.java:3399) at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:175) at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:305) at jenkins.model.Jenkins$5.runTask(Jenkins.java:1159) at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:222) at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:121) at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:70) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:829) Caused: org.jvnet.hudson.reactor.ReactorException at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:291) at jenkins.InitReactorRunner.run(InitReactorRunner.java:49) at jenkins.model.Jenkins.executeReactor(Jenkins.java:1194) at jenkins.model.Jenkins.<init>(Jenkins.java:984) at hudson.model.Hudson.<init>(Hudson.java:86) at hudson.model.Hudson.<init>(Hudson.java:82) at hudson.WebAppMain$3.run(WebAppMain.java:247) Caused: hudson.util.HudsonFailedToLoad at hudson.WebAppMain$3.run(WebAppMain.java:264)