Failed to run application after Upgrade to vaadin 8.1

After migrated my application from 7.7 to 8.0, I included all vaadin-compatibility, it works fine.

Tree was finally come out on Vaadin 8, so I migrated everything to 8 and removed vaadin-compatibility.
It compiled and run without problem within eclipse

But once I try to connect to the UI through web browser, I got following error:
Failed to load the widgetset:


What’s the problem with this? Do I still need to include V7 vaadin-compatibility in it?

Thank you for any help in advance!

Attached is my pom.xml
35105.xml (7.6 KB)

Hi LearningVaadin,

Check out your UI class and look for this annotation:

@Widgetset("com.vaadin.v7.Vaadin7WidgetSet") It’s used by the compatibility packages for the migration and if it’s still there it doesn’t need to be anymore.

If you have a custom widgetset you may also want to check your Widgetset.gwt.xml for this line:

 <inherits name="com.vaadin.v7.Vaadin7WidgetSet" />

You can read more about it under the Widgetset changes section in the migration post:

Thank you!

I found that too.