title: Vaadin 7.1.1: Failed to load the widgetset
body: <p>I have problem to run latest Vaadin 7.1.1 applications. It's mostly because I cannot find documentation for that version. Maven archetype creates old style app extending Root. Root is gone, so I'm trying to extend UI, like they do in Book of Vaadin.</p>
  
  <h2>web.xml:</h2>
  
  <pre><code>&lt;servlet&gt;
      &lt;servlet-name&gt;myservlet&lt;/servlet-name&gt;
      &lt;servlet-class&gt;
          com.vaadin.server.VaadinServlet
      &lt;/servlet-class&gt;
  
      &lt;init-param&gt;
          &lt;param-name&gt;UI&lt;/param-name&gt;
          &lt;param-value&gt;cz.simplecoin.simplegui.MainScreen&lt;/param-value&gt;
      &lt;/init-param&gt;
  &lt;/servlet&gt;
  </code></pre>
  
  <p>and MainScreen simply:</p>
  
  <pre><code>public class MainScreen extends UI {
  </code></pre>
  
  <p>Project compiles (with maven) correctly. When I debug I see init method of <code>MainScreen</code> called correctly, but I see only blank screen (bootstrap JavavScript is there) with the alert:</p>
  
  <h2>Error:</h2>
  
  <p>Failed to load the widgetset:./VAADIN/widgetsets/com.vaadin.DefaultWidgetSet/com.vaadin.DefaultWidgetSet.nocache.js?1393503103223 </p>
  
  <p>I want to start with Default widgetset. I'm almost sure that it's somehow problem in maven build/dependency. I have no Idea what libraries to use: I tried both variants (commented)</p>
  
  <h2>pom.xml:</h2>
  
  <pre><code>&lt;dependency&gt;
      &lt;groupId&gt;com.vaadin&lt;/groupId&gt;
      &lt;artifactId&gt;vaadin-server&lt;/artifactId&gt;
      &lt;version&gt;${vaadin.version}&lt;/version&gt;
  &lt;/dependency&gt;
  &lt;!--
  &lt;dependency&gt;
      &lt;groupId&gt;com.vaadin&lt;/groupId&gt;
      &lt;artifactId&gt;vaadin-themes&lt;/artifactId&gt;
      &lt;version&gt;${vaadin.version}&lt;/version&gt;
  &lt;/dependency&gt;
  &lt;dependency&gt;
      &lt;groupId&gt;com.vaadin&lt;/groupId&gt;
      &lt;artifactId&gt;vaadin-client&lt;/artifactId&gt;
      &lt;version&gt;${vaadin.version}&lt;/version&gt;
  &lt;/dependency&gt;
  &lt;dependency&gt;
      &lt;groupId&gt;com.vaadin&lt;/groupId&gt;
      &lt;artifactId&gt;vaadin-client-compiler&lt;/artifactId&gt;
      &lt;version&gt;${vaadin.version}&lt;/version&gt;
  &lt;/dependency&gt;
  &lt;dependency&gt;
      &lt;groupId&gt;com.vaadin&lt;/groupId&gt;
      &lt;artifactId&gt;vaadin-theme-compiler&lt;/artifactId&gt;
      &lt;version&gt;${vaadin.version}&lt;/version&gt;
  &lt;/dependency&gt;
  &lt;dependency&gt;
      &lt;groupId&gt;com.vaadin.addon&lt;/groupId&gt;
      &lt;artifactId&gt;vaadin-charts&lt;/artifactId&gt;
      &lt;version&gt;1.0.0&lt;/version&gt;
  &lt;/dependency&gt;
  --&gt;
  </code></pre>
  
  <p>I may try to use own widgetset,to see if that solves the issue.</p>