Can't load CAMixerSRx4_DF.pth

[gjhnb18]

File "demo/uniad_fast_api.py", line 197, in prepare_SR_model
model.load_state_dict(torch.load('ckpts/CAMixerSRx4_DF.pth', map_location=torch.device('cuda:0'))['params_ema'], strict=True)
_pickle.UnpicklingError: invalid load key, '\x0a'.

[gjhnb18]

I have tried to download the whole project, and copy the pth file,and then it works
https://github.com/icandle/CAMixerSR