Thread: Jenkins error: Unable to read /home/jenkins/.jenkins/config.xml

Hi all, Jenkins Problem Statement -

During jenkins restart process getting below error

hudson.util.HudsonFailedToLoadrg.jvnet.hudson.reactor.ReactorException: java.io.IOException: Unable to read /home/jenkins/.jenkins/config.xml
at hudson.WebAppMain$3.run(WebAppMain.java:248)
Caused by: org.jvnet.hudson.reactor.ReactorException:java.io. IOException: Unable to read /home/jenkins/.jenkins/config.xml

Caused by: jenkins.util.xstream.CriticalXStreamException:
hudson.plugins.active_directory.ActiveDirectorySec urityRealm :
hudson.plugins.active_directory.ActiveDirectorySec urityRealm

---- Debugging information ----

message: hudson.plugins.active_directory.ActiveDirectorySec urityRealm
cause-exception :
com.thoughtworks.xstream.mapper.CannotResolveClass Exception

cause-message :
hudson.plugins.active_directory.ActiveDirectorySec urityRealm
class : hudson.model.Hudson
required-type : hudson.model.Hudson
converter-type : hudson.util.RobustReflectionConverter
path : /hudson/securityRealm
line number : 550
version : not available
-------------------------------

IMPORTANT: Debugging info highlights the issues around - Active Directory / LDAP Plugin

NOTE: Upon disabling (commenting line number 550 on config.xml) Jenkins UP but unable to login to Jenkins.

Thanks in advance.