title: jenkins artifactory JellyTagException
body: <p>I have the newest Jenkins LTS version: 2.138.2.</p>
  
  <p>Everytime, after installation of Artifactory Plugin, when I enter <code>"Manage Jenkins -&gt; Configure System"</code> I get the Exception:</p>
  
  <pre><code>Stack-Trace: 
  
  org.apache.commons.jelly.JellyTagException: jar:file:/var/cache/jenkins    
  /war/WEB-INF/lib/jenkins-core-2.149.jar!/jenkins/model/Jenkins/configure.jelly:51:84: &lt;st:include&gt; No page found 'config.jelly' for class org.jenkinsci.plugins.configfiles.GlobalConfigFiles
  at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:124)
  at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
  </code></pre>
  
  <p>I have search already long in Interent. I have tried the newest <code>Jenkins Version: 2.149</code></p>
  
  <p>Maybe should I report a bug?</p>
  
  <p><a href="https://i.stack.imgur.com/RR6P8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RR6P8.png" alt="enter image description here"></a></p>