runtime error

Traceback (most recent call last): File "app.py", line 4, in <module> learner = load_learner('model.pkl') File "/home/user/.local/lib/python3.8/site-packages/fastai/learner.py", line 438, in load_learner try: res = torch.load(fname, map_location=map_loc, pickle_module=pickle_module) File "/home/user/.local/lib/python3.8/site-packages/torch/serialization.py", line 789, in load return _load(opened_zipfile, map_location, pickle_module, **pickle_load_args) File "/home/user/.local/lib/python3.8/site-packages/torch/serialization.py", line 1131, in _load result = unpickler.load() File "/home/user/.local/lib/python3.8/site-packages/torch/serialization.py", line 1124, in find_class return super().find_class(mod_name, name) ModuleNotFoundError: No module named 'timm.models.layers.norm'

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