Project Sync failed solution for importing previous versions of the system using Android Studio

Project Sync failed solution for importing previous versions of the system using Android Studio
Error: (0) Gradle DSL method not found: ' Runproguard () ' Possible causes:

• The project ' Hackertool ' May is using a version of Gradle that does not contain the method. Open Gradle Wrapper file
• The build file may be missing a Gradle plugin. Apply Gradle Plugin

-Modify Runproguard to minifyenabled

Previous Code:
Buildtypes {
Release {
Runproguard false
Proguardfiles getdefaultproguardfile (' proguard-android.txt '), ' proguard-rules.txt '
}
}
Current Code:
Buildtypes {
Release {
Minifyenabled false
Proguardfiles getdefaultproguardfile (' proguard-android.txt '), ' proguard-rules.txt '
}
}

Project Sync failed solution for importing previous versions of the system using Android Studio