Guys I started following Mathew Halberg's make in 6 minute augmented reality app

https://www.youtube.com/watch?v=lMFn8eTwePI

 . Im using unity 2018.3.0f 2 and Vuforia Engine v8.5.8

and im getting these following errors.

On screen in unity Play mode i can see my character and i can move him in the unity play mode

but when i complie the apk file n run it on my android i cant my character .

My android lacks gyroscope so i guess this is why i get 2nd error but i ran that apk file on my friend's android he has gyroscope and android 7.8 something OS.

I should get this error but why does the same thing happen on my friend's android i cant figure out please help.

Also when i run the game in unity play mode my character disappears and then reappears.

Ive followed the video to the letter.

I set up ground plane stage and Plane Finder.

Assign Ground Plane Stage to Contetn positioning behavior script

Plane finder Behavior as interactive

On my plane Finder i add the character object and use a function to move him and also the toggle button

I set my character as child object of Ground Plane Stage

Error 1

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()

Error 2

Unable to start ObjectTracker. Your hardware may not support it.

UnityEngine.Debug:LogError(Object)

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()