Spring Roo - springroo can't setup gwt - Stack Overflow

spring roo - springroo can't setup gwt - Stack Overflow

I had the same problem with the Roo sample expenses.roo project. I solved it by adding the missing maven dependancy to project.
From Roo shell run this:

dependency add --groupId com.google.appengine --artifactId appengine-api-1.0-sdk --version 1.4.0