Groundplane breaking upon android build

So I can use the groundplane during unity test with my webcam and the printed plane tracker but the moment I build out to Android the groundplane function ceases to work. When I go back and test in unity I get this error:

Positional Device Tracker is not available. UnityEngine.Debug:LogError(Object) Vuforia.ContentPositioningBehaviour:OnVuforiaStarted() System.Delegate:DynamicInvoke(Object[]) Vuforia.DelegateHelper:InvokeDelegate(Delegate, Object[]) Vuforia.DelegateHelper:InvokeWithExceptionHandling(Action) Vuforia.VuforiaARController:StartAfterInitializationCompleted() Vuforia.VuforiaARController:UpdateState(Boolean, Boolean) Vuforia.DigitalEyewearARController:Update() System.Delegate:DynamicInvoke(Object[]) Vuforia.DelegateHelper:InvokeDelegate(Delegate, Object[]) Vuforia.DelegateHelper:InvokeWithExceptionHandling(Action) Vuforia.VuforiaBehaviour:Update()

Exception in callback: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object   at Vuforia.PlaymodeSmartTerrainImpl.FindGroundPlaneImageTarget () [0x00000] in <filename unknown>:0   at Vuforia.PlaymodeSmartTerrainImpl.get_GroundPlaneImageTarget () [0x00000] in <filename unknown>:0   at Vuforia.PlaymodeSmartTerrainImpl.CreateEmulatorGroundPlane () [0x00000] in <filename unknown>:0   at Vuforia.PlaymodeSmartTerrainImpl.StartSmartTerrain () [0x00000] in <filename unknown>:0   at Vuforia.PlaymodeSmartTerrainImpl.Start () [0x00000] in <filename unknown>:0   at Vuforia.PlaneFinderBehaviour.StartSmartTerrain () [0x00000] in <filename unknown>:0   at Vuforia.PlaneFinderBehaviour.OnVuforiaStarted () [0x00000] in <filename unknown>:0   at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception&)   at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x000d0] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222   --- End of inner exception stack trace ---   at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x000eb] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232   at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115   at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x000b9] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Delegate.cs:443   at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00018] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/MulticastDelegate.cs:71   at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Delegate.cs:415   at Vuforia.DelegateHelper.InvokeDelegate (System.Delegate action, System.Object[] args) [0x00000] in <filename unknown>:0 UnityEngine.Debug:LogError(Object) Vuforia.DelegateHelper:InvokeDelegate(Delegate, Object[]) Vuforia.DelegateHelper:InvokeWithExceptionHandling(Action) Vuforia.VuforiaARController:StartAfterInitializationCompleted() Vuforia.VuforiaARController:UpdateState(Boolean, Boolean) Vuforia.DigitalEyewearARController:Update() System.Delegate:DynamicInvoke(Object[]) Vuforia.DelegateHelper:InvokeDelegate(Delegate, Object[]) Vuforia.DelegateHelper:InvokeWithExceptionHandling(Action) Vuforia.VuforiaBehaviour:Update()

I'm not sure what's happening. I've tried redoing the vuforia behaviour component.