title: Groovy/Grails - Unable to Resolve Class
body: <p>I am trying to build a Grails project in STS and am getting many error messages of the form: <code>Groovy:unable to resolve class org.codehaus.groovy.grails.commons.ConfigurationHolder</code> as well as others like <code>Groovy:unable to resolve class org.grails.plugins.springsecurity.service.AuthenticateService</code>
  .  I have Grails 1.3.7 selected in the Project Properties, but I don't see an item for 'Grails Depedencies' like I do when I create a sample project.  Is this the problem?  How can I add it back in?</p>