new project not work (in Mac machine)

[giovannib]

Hi.

I installed Eclipse Neon (4.6.3), Vaadin 8 (Designer 2 ver. 2.1, Plugin ver. 4.0) for Eclipse, Tomcat 8.5.

Start a new project (Vaadin 8), Single-mode application model, button "finish", run-as, run on server, tomcat.
Start webserver; write in browser "localhost:8080/myproject" and I get the following error:
"apr 28, 2017 9:34:27 PM com.vaadin.server.VaadinServlet serveStaticResourcesInVAADIN
INFORMAZIONI: Requested resource [/VAADIN/widgetsets/AppWidgetset/AppWidgetset.nocache.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder."

The same steps have been on a Windows machine with the same versions and the demo application works properly.

Thanks for your help.
Giovanni