An assertion error occurred during model loading

[Benjamin-zhangjb]

I conducted reinforcement learning training using the RLlib framework. After training, I used the saved model for inference, but an assertion error occurred during model loading!
Below is the model file I loaded：
checkpoint_000000.zip

from ray.rllib.algorithms.algorithm import Algorithm 
algo = Algorithm.from_checkpoint(model_path)

The error is as follows:

Traceback (most recent call last):
  File "rl/main.py", line 44, in <module>
    main()
  File "rl/main.py", line 26, in main
    train.main(config)
  File "/code/rl/train.py", line 107, in main
    do_evaluation(confighandler, model_path)
  File "/code/rl/train.py", line 210, in do_evaluation
    evaluation(confighandler, model_path, confighandler.agent_feature_map)
  File "/code/rl/evaluation/eva.py", line 78, in evaluation
    algo = Algorithm.from_checkpoint(model_path)
  File "/usr/local/lib/python3.8/dist-packages/ray/rllib/algorithms/algorithm.py", line 350, in from_checkpoint
    state = Algorithm._checkpoint_info_to_algorithm_state(
  File "/usr/local/lib/python3.8/dist-packages/ray/rllib/algorithms/algorithm.py", line 3048, in _checkpoint_info_to_algorithm_state
    state = pickle.load(f)
  File "/usr/local/lib/python3.8/dist-packages/ray/_private/serialization.py", line 107, in _actor_handle_deserializer
    return ray.actor.ActorHandle._deserialization_helper(serialized_obj, outer_id)
  File "/usr/local/lib/python3.8/dist-packages/ray/actor.py", line 1580, in _deserialization_helper
    return worker.core_worker.deserialize_and_register_actor_handle(
  File "python/ray/_raylet.pyx", line 4364, in ray._raylet.CoreWorker.deserialize_and_register_actor_handle
  File "python/ray/_raylet.pyx", line 4320, in ray._raylet.CoreWorker.make_actor_handle
  File "/usr/local/lib/python3.8/dist-packages/ray/_private/function_manager.py", line 572, in load_actor_class
    actor_class = self._load_actor_class_from_gcs(
  File "/usr/local/lib/python3.8/dist-packages/ray/_private/function_manager.py", line 666, in _load_actor_class_from_gcs
    class_name = ensure_str(class_name)
  File "/usr/local/lib/python3.8/dist-packages/ray/_private/utils.py", line 243, in ensure_str
    assert isinstance(s, bytes)
AssertionError