Locked out of Jenkins? Don't worry.

You just setup a new Jenkins box, and you're trying to setup security, but somehow you end up with this screen:

User is missing the Overall/Read permission

All you need to do is go to $JENKINS_HOME/config.xml

?xml version='1.0' encoding='UTF-8'?>

<hudson>

  <disabledAdministrativeMonitors/>

  <version>2.45</version>

  <numExecutors>4</numExecutors>

  <mode>NORMAL</mode>

  <useSecurity>true</useSecurity>

  <authorizationStrategy class="hudson.security.AuthorizationStrategy$Unsecured"/>

  <securityRealm class="hudson.security.HudsonPrivateSecurityRealm">

    <disableSignup>true</disableSignup>

    <enableCaptcha>false</enableCaptcha>

  </securityRealm>

And change <useSecurity> to false. Then restart the jenkins process to pickup the change.

Now get back in there and configure it correctly!