Comment 2 for bug 1588225

It seems to me you have been using one of our bleeding edge ppa's. All ppa's except the release ppa might contain packages that are in beta or even earlier states. However we just released a new set of beta packages into the tools-development ppa. Please try again with them at let me know if it helps.
Also see:

https://developer.ubuntu.com/en/blog/2016/06/14/calling-testers-new-ubuntu-sdk-ide-post/