title: WindowBuilder was not able to show the GUI. unable to load *.wbp-component.xml description for component javax.swing.JFrame
body: <p>I'm using Eclipse 2021-9 version and already have windowbuilder installed. this error happens when I click the designer tab. Can anybody help me?</p>
  <p><a href="https://i.stack.imgur.com/nZ5iS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nZ5iS.png" alt="Error dialog" /></a></p>