Android studio 2.1.1 gradle project sync failed

I just installed android studio 2.1.1. And when I'm opening a old project I'm getting this error-

Platform and Plugin Updates: The following components are ready to update: Android Support Repository, Google Repository, Google APIs Intel x86 Atom System Image, Android SDK Tools 25.1.7
8:18:58 AM Gradle sync started
8:19:39 AM Gradle sync failed: Could not find com.android.tools.build:gradle:2.2.1
Please help. I'm beginner here...