Animation Rigging "Humanoid" Error

I am trying to use the new animation rigging package and was told you can use humanoid avatars, but I keep getting this error from my animator.

InvalidOperationException: The TransformStreamHandle cannot be resolved.
UnityEngine.Animations.TransformStreamHandle.CheckIsValidAndResolve (UnityEngine.Animations.AnimationStream& stream) (at <049be2afe36f487eb06ef49d51a0bab6>:0)
UnityEngine.Animations.TransformStreamHandle.SetLocalTRS (UnityEngine.Animations.AnimationStream stream, UnityEngine.Vector3 position, UnityEngine.Quaternion rotation, UnityEngine.Vector3 scale, System.Boolean useMask) (at <049be2afe36f487eb06ef49d51a0bab6>:0)
UnityEngine.Animations.Rigging.RigSyncSceneToStreamJob+TransformSyncer.Sync (UnityEngine.Animations.AnimationStream& stream) (at Library/PackageCache/com.unity.animation.rigging@0.2.6-preview/Runtime/AnimationJobs/RigSyncSceneToStreamJob.cs:51)
UnityEngine.Animations.Rigging.RigSyncSceneToStreamJob.ProcessAnimation (UnityEngine.Animations.AnimationStream stream) (at Library/PackageCache/com.unity.animation.rigging@0.2.6-preview/Runtime/AnimationJobs/RigSyncSceneToStreamJob.cs:119)
UnityEngine.Animations.ProcessAnimationJobStruct`1[T].Execute (T& data, System.IntPtr animationStreamPtr, System.IntPtr methodIndex, Unity.Jobs.LowLevel.Unsafe.JobRanges& ranges, System.Int32 jobIndex) (at <049be2afe36f487eb06ef49d51a0bab6>:0)

I had the same problem,help…

Same problem here, any luck finding a solution?