I'm trying to follow the steps given at Getting Started with AEM Sites Chapter 1 - Project Setup for setting up a new project and getting to know 6.4.
At some point it asks to add Core, Apps and content jars to the server. But in my case I'm not seeing the ui.apps jar as an option to add.
Even archetype 15 should be working. Can you create a new project and see if you still see the same issue ?
The import for ui.apps is not in eclipse. Oddly this is not the case when I'm using Maven archetype 14. The issue is only with Archetype 15.
I can see all three.
Are all three import in eclipse? Are you able to deploy changes in AEM using maven autoInstall?
Under the section : Create an 'AEM Server' with AEM Dev Tools.
Can you point in the document where this step is mentioned?