ValueError: Decompressed Data Too Large and acc is strangely low

Thanks for your amazing work!
When I run python main_moco.py and main_lincls.py, an error occured:

I searched the error in the Internet and tried to add some lines in front of the python code:

The error is gone and I can run the two python file well. However, the accuracy is strangely low. For example, this is when I run python main_lincls.py with your provided 800-epoch MOCOv2 pre-trained model, which is supposed to get a 71.1 top-1 acc after 100 epochs of linear classify training.

I'm really confused, and I think my env of python, pytorch, torchvision is OK. I have no idea what is going wrong. I hope you could help me. Thank you very much!