Simple polymer injection

Vaadin 6 / 7 / 8
3

I tryed to use @HtmlImport annotation inside Liferay DXP :
@HtmlImport(“vaadin://bower_components/vaadin-combo-box/vaadin-combo-box.html”)
But I received the following exception:
17:50:01,882 WARN [http-nio-7007-exec-10]

[code_jsp:181]
{code=“404”, msg=“ProxyServlet: /vaadin-8.1.0/VAADIN/bower_components/vaadin-combo-box/vaadin-combo-box.html”, uri=/o/vaadin-8.1.0/VAADIN/bower_components/vaadin-combo-box/vaadin-combo-box.html}

Of course the Combo box is never shown. Any idea how can I fiz the path.