title: Error occurred during initialization of boot layer
body: <p>I followed the steps to create the HelloWorld example but it doesn't run. It gives the following error:</p>
  
  <blockquote>
    <p>Error occurred during initialization of boot layer
    java.lang.module.FindException: Error reading module:
    F:\Develop\eclipse\HelloWorld\bin Caused by:
    java.lang.module.InvalidModuleDescriptorException: HelloWorld.class
    found in top-level directory (unnamed package not allowed in module)"</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/itGRF.png" rel="noreferrer"><img src="https://i.stack.imgur.com/itGRF.png" alt="enter image description here"></a>
  Please advise how to solve this.</p>