"We offer new support options and therefor the forums are now in read-only mode! Please check out our Support Center for more information." - Vuforia Engine Team

Vuforia Ground plane Error build

when i build the ground plane for android, this erros shows. Im using Unity 2017.3.0f1 (64-bit).

Error:C:\Program Files (x86)\Android\android-sdk\tools is not a directory. calculated from system property com.android.sdkmanager.toolsdir

CommandInvokationFailure: Unable to resolve build tools directory.

Error building Player: CommandInvokationFailure: Unable to resolve build tools directory.

Build completed with a result of 'Failed'

UnityEditor.BuildPlayerWindow+BuildMethodException: 3 errors