Unable to train

[Maple498]

I keep getting the following error when running the train.py code:
(PPO pid=3999418) ValueError: No default encoder config for obs space=Dict('building': Box(-1.0, 1.0, (15,), float64), 'pv': Box(-1.0, 1.0, (1,), float64), 'storage': Box(-1.0, 1.0, (1,), float64)), lstm=False found.
ERROR conda.cli.main_run:execute(47): conda run python /home/jxzhang/PowerGridworld/PowerGridworld/examples/marl/rllib/heterogeneous/train.py failed. (See above for error)
In addition, I also encountered a deprecation exception related to stop=stop during the run.
This seems to be related to the ray version? How can I solve this problem? Is a specific version of ray required?