Building ECS with Burst on Android.

Hi all, I'm trying to build a rather simple ECS example on a android device( The oculus quest) but I'm getting build errors from the compiler. The error is as follows :

Code (CSharp):

1. Cannot find the field `TypeInfos` required for supporting TypeManager intrinsics in burst
2. at Unity.Entities.TypeManager.GetTypeInfo(int typeIndex) (at C:\Users\Uri\SpellPunk\Library\PackageCache\com.unity.entities@0.3.0-preview.4\Unity.Entities\Types\TypeManager.cs:431)
3.  

This is the code I'm trying to build :

Code (CSharp):

1. using System;
2. using Unity.Entities;
3. [Serializable]
4. public struct MoveComponent : IComponentData
5. {
6.     public float MoveSpeed;
7. }
8.  

Code (CSharp):

1. using Unity.Burst;
2. using Unity.Collections;
3. using Unity.Entities;
4. using Unity.Jobs;
5. using Unity.Mathematics;
6. using Unity.Transforms;
7.  
8. public class MoveSystem : JobComponentSystem
9. {
10.  
11.     [BurstCompile]
12.     struct RotationJob : IJobForEach<Rotation, MoveComponent>
13.     {
14.         public float DeltaTime;
15.  
16.         public void Execute(ref Rotation rotation, [ReadOnly] ref MoveComponent rotationSpeed)
17.         {
18.             rotation.Value = math.mul(math.normalize(rotation.Value), quaternion.AxisAngle(math.up(), rotationSpeed.MoveSpeed * DeltaTime));
19.         }
20.     }
21.  
22.     protected override JobHandle OnUpdate(JobHandle inputDeps)
23.     {
24.         RotationJob rotationJob = new RotationJob
25.         {
26.             DeltaTime = Time.DeltaTime,
27.         };
28.  
29.         return rotationJob.Schedule(this, inputDeps);
30.     }
31. }
32.  

Code (CSharp):

1. using Unity.Collections;
2. using Unity.Entities;
3. using Unity.Mathematics;
4. using Unity.Transforms;
5. using UnityEngine;
6. //using Unity.Rendering;
7. using UnityEngine.UI;
8.  
9. public class SystemManager : MonoBehaviour
10. {
11.     public GameObject Prefab;
12.     public int Count;
13.     public int circleRadius;
14.     public float RotSpeed;
15.     private Vector3 origin;
16.     private EntityManager Manager;
17.     private int x, y;
18.     // Start is called before the first frame update
19.     void Start()
20.     {
21.         Manager = World.DefaultGameObjectInjectionWorld.EntityManager;
22.         origin = new Vector3(4.0f, 3.8f, 0.0f);
23.         AddCubes();
24.     }
25.  
26.     // Update is called once per frame
27.   private void AddCubes()
28.     {
29.         NativeArray<Entity> cubeEntities = new NativeArray<Entity>(Count, Allocator.Temp);
30.         var settings = GameObjectConversionSettings.FromWorld(World.DefaultGameObjectInjectionWorld, null);
31.         Entity prefab = GameObjectConversionUtility.ConvertGameObjectHierarchy(Prefab, settings);
32.         //Manager.Instantiate(prefab, cubeEntities);
33.  
34.         for (int i = 0; i < Count; i++)
35.         {
36.          
37.             for (int j = 0; j < Count; j++)
38.             {
39.                 Entity instance = Manager.Instantiate(prefab);
40.                 Vector3 pos = transform.TransformPoint(new float3(i * 1.3F, noise.cnoise(new float2(i, j) * 0.21F) * 2, j*1.3F));
41.                 Manager.AddComponentData(instance, new MoveComponent { MoveSpeed = RotSpeed });
42.                 Manager.SetComponentData(instance, new Translation { Value = pos });
43.              
44.  
45.             }
46.         }
47. #if UNITY_EDITOR
48.         // Name each entity
49.         for (int i = 0; i < cubeEntities.Length; i++)
50.         {
51.             Manager.SetName(cubeEntities[i], "Cube Entity " + i);
52.         }
53. #endif
54.         cubeEntities.Dispose();
55.     }
56.  

I'm a missing something simple or what ?
Edit: NeverMined I fixed it by updating the burst package to the latest preview