Download basicModel_f_lbs_10_207_0_v1.0.0.pkl, basicModel_m_lbs_10_207_0_v1.0.0.pkl, and basicModel_neutral_lbs_10_207_0_v1.0.0.pkl from here (female & male) and here (neutral) to ${ROOT}/smplpytorch/smplpytorch/native/models.
It seems that it should be ${ROOT}/common/utils/smplpytorch/smplpytorch/native/models. rather than ${ROOT}/smplpytorch/smplpytorch/native/models.
In https://github.com/hongsukchoi/3DCrowdNet_RELEASE/blob/main/assets/directory.md#pytorch-smpl-layer-and-vposer The description is
It seems that it should be
${ROOT}/common/utils/smplpytorch/smplpytorch/native/models.
rather than${ROOT}/smplpytorch/smplpytorch/native/models
.