I am trying to import a project in my Android Studio 1.5.1. I firstly removed one error of 'com.android.application' not found but then this error has been risen. enter image description here
Gradle sync failed: Could not find property 'VERSION_CODE' on ProductFlavor_Decorated{name=main, dimension=null, minSdkVersion=DefaultApiVersion{mApiLevel=14, mCodename='null'}, targetSdkVersion=DefaultApiVersion{mApiLevel=23, mCodename='null'}, renderscriptTargetApi=null, renderscriptSupportModeEnabled=null, renderscriptNdkModeEnabled=null, versionCode=null, versionName=null, applicationId=com.fractalwrench.androidbootstrap.sample, testApplicationId=null, testInstrumentationRunner=null, testInstrumentationRunnerArguments={}, testHandleProfiling=null, testFunctionalTest=null, signingConfig=null, resConfig=null, mBuildConfigFields={}, mResValues={}, mProguardFiles=[], mConsumerProguardFiles=[], mManifestPlaceholders={}}.