UnpicklingError: invalid load key, 'H'

[Mar-Gra-creator]

hey do you know what could be wrong?
cheers

(grasr) marcin@marcin-B550-AORUS-ELITE-AX-V2:~/GraSR$ python main.py -m ./t -q ./q -o result
Traceback (most recent call last):
  File "main.py", line 40, in <module>
    main()
  File "main.py", line 31, in main
    q_descriptors = get_descriptors(args.model, args.query_protein, qd_out_path)
  File "/home/marcin/anaconda3/envs/grasr/lib/python3.6/site-packages/torch/autograd/grad_mode.py", line 43, in decorate_no_grad
    return func(*args, **kwargs)
  File "/home/marcin/GraSR/encode.py", line 100, in get_descriptors
    net_list = [load_model(mp) for mp in model_path_list]
  File "/home/marcin/GraSR/encode.py", line 100, in <listcomp>
    net_list = [load_model(mp) for mp in model_path_list]
  File "/home/marcin/GraSR/encode.py", line 28, in load_model
    state_dict = {k.replace("module.", ""): v for k, v in torch.load(model_path, map_location='cpu').items()}
  File "/home/marcin/anaconda3/envs/grasr/lib/python3.6/site-packages/torch/serialization.py", line 387, in load
    return _load(f, map_location, pickle_module, **pickle_load_args)
  File "/home/marcin/anaconda3/envs/grasr/lib/python3.6/site-packages/torch/serialization.py", line 564, in _load
    magic_number = pickle_module.load(f, **pickle_load_args)
_pickle.UnpicklingError: invalid load key, 'H'.