title: Error loading plugin manager: null on GGTS 3.4.0
body: <p>after entering the following command in GGTS 3.4.0:</p>
  
  <pre><code>generate-controller org.strotmann.fahrauftraege.Fahrauftrag
  </code></pre>
  
  <p>I get: </p>
  
  <pre><code>Loading Grails 2.2.4
  Configuring classpath.
  Environment set to development.....
  Packaging Grails application.....
  Packaging Grails application..... Error
    Error loading plugin manager: null 
  </code></pre>