KL value seems None Value

[Zhongan-Wang]

Hi,thanks for your great work, However When I run the python InterScene/run.py --task HumanoidLocationSit --cfg_env InterScene/data/cfg/humanoid_location_sit.yaml --cfg_train InterScene/data/cfg/train/rlg/amp_task_location_sit.yaml --motion_file InterScene/data/dataset_samp_sit/dataset_samp_sit.yaml --num_envs 32 --headless Some errors occur.

Traceback (most recent call last):
  File "InterScene/run.py", line 223, in <module>
    main()
  File "InterScene/run.py", line 218, in main
    runner.run(vargs)
  File "/home/anaconda3/envs/skillmimic/lib/python3.8/site-packages/rl_games/torch_runner.py", line 139, in run
    self.run_train()
  File "/home/anaconda3/envs/skillmimic/lib/python3.8/site-packages/rl_games/torch_runner.py", line 125, in run_train
    agent.train()
  File "/home/InterScene/InterScene/learning/common_agent.py", line 132, in train
    train_info = self.train_epoch()
  File "/home/InterScene/InterScene/learning/amp_agent.py", line 266, in train_epoch
    av_kls = torch_ext.mean_list(train_info['kl'])

TypeError: 'NoneType' object is not subscriptable
Could you help me solve this