Android Studio 2.2.2: All packages are not available for download

Question

I installed Android Studio 2.2.2 on my system. After when I openend one of the projects which have compileSdkVersion 23, got following error,

Answer 1

You need add check in, open Settings -> Appearance & Behavior -> System Settings -> Android SDK -> SDK Tools -> Launch Standalone SDK Manager

FIRST SDKPlatform to 23

SECOND Tools to 23

and ever end sync up..