title: Why do I get a NoClassDefFound error when I try to save my test plan?
body: <p>I installed apache-jmeter-5.1.1 and java 1.8.0_221 (8), and was walking through the <a href="https://jmeter.apache.org/usermanual/build-web-test-plan.html" rel="noreferrer">getting started guide</a> to build a web test plan in the GUI. But when I click save to save the Test Plan I receive the below error:</p>
  <blockquote>
  <p>Uncaught Exception java.lang.NoClassDefFoundError: Could not initialize class org.apache.jmeter.gui.util.FileDialoger. See log file for details.</p>
  </blockquote>
  <p>Full Output in debugger:</p>
  <pre><code>2019-07-24 15:30:13,306 ERROR o.a.j.JMeter: Uncaught exception: 
  java.lang.NoClassDefFoundError: Could not initialize class org.apache.jmeter.gui.util.FileDialoger
      at org.apache.jmeter.gui.action.Save.computeFileName(Save.java:203) ~[ApacheJMeter_core.jar:5.1.1 r1855137]
      at org.apache.jmeter.gui.action.Save.doAction(Save.java:165) ~[ApacheJMeter_core.jar:5.1.1 r1855137]
      at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:88) ~[ApacheJMeter_core.jar:5.1.1 r1855137]
      at org.apache.jmeter.gui.action.ActionRouter.lambda$actionPerformed$0(ActionRouter.java:70) ~[ApacheJMeter_core.jar:5.1.1 r1855137]
      at java.awt.event.InvocationEvent.dispatch(Unknown Source) ~[?:1.8.0_221]
      at java.awt.EventQueue.dispatchEventImpl(Unknown Source) ~[?:1.8.0_221]
      at java.awt.EventQueue.access$500(Unknown Source) ~[?:1.8.0_221]
      at java.awt.EventQueue$3.run(Unknown Source) ~[?:1.8.0_221]
      at java.awt.EventQueue$3.run(Unknown Source) ~[?:1.8.0_221]
      at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_221]
      at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) ~[?:1.8.0_221]
      at java.awt.EventQueue.dispatchEvent(Unknown Source) ~[?:1.8.0_221]
      at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) [?:1.8.0_221]
      at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) [?:1.8.0_221]
      at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [?:1.8.0_221]
      at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_221]
      at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_221]
      at java.awt.EventDispatchThread.run(Unknown Source) [?:1.8.0_221]
  </code></pre>
  <p>Any idea how to resolve?</p>