[GWT] [ERROR] Hint: Check that your module inherits 'com.google.gwt.core.Core'

Hi all,

I haven't done GWT development for a while and wanted to try again. I installed JDK 12 and Eclipse 2019-03. I installed GWT Eclipse Plugin (GWT 2.8.1). 

From Eclipse, I created a hello world project this way:

1. Click on 'New GWT Application Project'
2.  Project name: Gwt5, Package: com.foo, Use default SDK (GWT 2.8.1)
3. Click on 'GWT Compile Project'

I see this error:

Compiling module com.foo.Gwt5

   [ERROR] Hint: Check that your module inherits 'com.google.gwt.core.Core' either directly or indirectly (most often by inheriting module 'com.google.gwt.user.User')

I didn't change my gwt.xml.

Any suggestion?

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