AutocompleteExtension not doing anything.

From the sample code on https://vaadin.com/directory#!addon/autocomplete-extension it seems this must be one of the easiest addons to use, and still I fail ... :---(

I'm running Vaadin 8.0.3 with Spring Boot 1.5.2 as per Spring Initializr + 

<dependency>
<groupId>org.vaadin.spring.addons</groupId>
<artifactId>vaadin-spring-addon-sidebar</artifactId>
<version>2.0.0-SNAPSHOT</version>
</dependency>

I have a View that starts out like this

@SpringComponent
@SpringView(name = DefaultViewComponent.VIEW_NAME)
@SideBarItem(sectionId = Sections.CUSTOMERS, caption = "Customers", order = 1)
@FontAwesomeIcon(FontAwesome.DATABASE)
@ViewScope
@Slf4j
public class DefaultViewComponent extends DefaultView implements View { 
...
   private TextField txtSearch = new TextField();
   private AutocompleteExtension<String> extSearch = new AutocompleteExtension<>(txtSearch);
...
   @Override public void enter(ViewChangeListener.ViewChangeEvent event) {
...
      extSearch.setSuggestionGenerator(this::find);
  }
...
  private List<String> find(String search, int cap) {
     log.info("find(): {}", search);
     return ImmutableList.of("Ole", "Dole", "Doffen");
  }
...
}

Never stops in the find-method in the debugger, and the log statemet doesn't get invoked either. What am I doing wrong? 
 

For the record, I do get it running in a plain application generated from the vaadin archetype...

jon martin solaas: For the record, I do get it running in a plain application generated from the vaadin archetype...

PS created a plain Spring Boot application, with a minimum UI with autocomplete (copy of a working test ui with vaadin archetype with jetty), and the autocomplete does not respond.
 

Widgetset must be compiled ...

https://github.com/wbadam/autocomplete-extension/issues/5#issuecomment-288650500

thanks, Adam!