Error in call to target 'hulc2.wrappers.hulc2_wrapper.Hulc2Wrapper':

[dmzsyl]

when I try training
The error is as follows：

hydra.errors.InstantiationException: Error in call to target 'hulc2.wrappers.hulc2_wrapper.Hulc2Wrapper':
InstantiationException("Error in call to target 'calvin_env.envs.play_table_env.PlayTableSimEnv':\nTypeError('expected str, bytes or os.PathLike object, not NoneType')\nfull_key: env")
full_key: env_cfg