Sample scene FBVS error: Unsupported conversion of vertex data

[xxxh123]

Hi,

I just load the sample FullBodyVolumetricSoftBody, and hit the play button, but it shows: 

Unsupported conversion of vertex data (format 0 to 4, dimensions 4 to 4)
UnityEngine.Mesh:SetBoneWeights (Unity.Collections.NativeArray`1<byte>,Unity.Collections.NativeArray`1<UnityEngine.BoneWeight1>)


OS:win10
Unity ver:2020.3 lts
Burst:1.5.6
Collections: 1.0.0-pre.6
Jobs: 0.11.0-preview.6

Please help!
Thanks!