in "play-fork.run.sbt" made it possible to build the application.
When trying "activator ui" the invalid version reference was restored and so the project once again failed to build (as noted previously).
I also noted in the IDE Configuration documentation for the Eclipse IDE that the line:
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0")
should be added to the plugins.sbt file, But it seems this currently has to be:
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0-RC2")
for the dependecy to work correctly.
But since the command line option to create an Eclipse project ("activator eclipse") seems to be gone (?) the "activator ui" really is needed for me to be able to work with the code in a sensible manner. Hoping for a quick fix to the activator :)
Cheers!
/Mats