title: This UIObject's element is not set; you may be missing a call to either Composite.initWidget() or UIObject.setElement()
body: <p>When running my GWT/Errai app I get this error message:</p>
  
  <blockquote>
    <p>00:00:00.000 [ERROR] Unable to load module entry point class
    org.jboss.errai.ioc.client.Container (see associated exception for
    details) java.lang.RuntimeException: critical error in IOC container
    bootstrap     at
    org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:69)
      at
    org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:34)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)     at
    com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396)     at
    com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
      at
    com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
      at
    com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
      at java.lang.Thread.run(Thread.java:722) Caused by:
    java.lang.AssertionError: This UIObject's element is not set; you may
    be missing a call to either Composite.initWidget() or
    UIObject.setElement()     at
    com.google.gwt.user.client.ui.UIObject.getElement(UIObject.java:527)
      at
    org.jboss.errai.ui.shared.TemplateUtil.compositeComponentReplace(TemplateUtil.java:61)
      at
    org.jboss.errai.ioc.client.BootstrapperImpl$65$1.init(BootstrapperImpl.java:1623)
      at
    org.jboss.errai.ioc.client.BootstrapperImpl$65$1.init(BootstrapperImpl.java:1)
      at
    org.jboss.errai.ioc.client.container.CreationalContext.resolveAllProxies(CreationalContext.java:351)
      at
    org.jboss.errai.ioc.client.container.CreationalContext.finish(CreationalContext.java:312)
      at
    org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:59)
      at
    org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:34)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)     at
    com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396)     at
    com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
      at
    com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
      at
    com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
      at java.lang.Thread.run(Thread.java:722)</p>
  </blockquote>
  
  <p>I've already done <code>mvn clean compile package gwt:run</code></p>