Hi Martin, I've started "mvn clean install", from IntelliJ..
Meanwhile I've adapted pom.xml in webapp module, as advised by Jörg, with next configuration
I think I had to exclude additional websocket-server-impl, since there are more jetty JAR's then jetty-all, I've also adapted the exclude to jetty-*.jar
The webapp launches now fine, but I have now a swagger issue, I don't see any restful service, see attached screenshots.
It seems that the service org.apache.isis.core.metamodel.services.swagger.SwaggerServiceDefault is not recongnized.
When I launch the webapp with IntelliJ launcher, with Jetty, everything works fine.