similar like error is happening to me when using dataloader for Celeba but not for mnist.
Error is
-----------------------------------------------------------------------
BadZipFile                                Traceback (most recent call last)
<ipython-input-21-51d4dd0d2430> in <module>()
      4                   transform=transforms.Compose([
      5       transforms.ToTensor(),
----> 6       transforms.Normalize((1, -1, 0.5), (0.5, -0.5, 1))
      7       ])
      8                   )

3 frames
/usr/lib/python3.6/zipfile.py in _RealGetContents(self)
   1196             raise BadZipFile("File is not a zip file")
   1197         if not endrec:
-> 1198             raise BadZipFile("File is not a zip file")
   1199         if self.debug > 1:
   1200             print(endrec)

BadZipFile: File is not a zip file

where only i was just downloading through DataLoader
as
dataset = torch.utils.data.DataLoader(     datasets.CelebA('data/',                     download=True,                    transform=transforms.Compose([       transforms.ToTensor(),       transforms.Normalize((1, -1, 0.5), (0.5, -0.5, 1))       ])                   ) )
I have torch version of '1.5.0+cu101’
Even for ImageNet it is now not publicly accessible ,why

RuntimeError: The dataset is no longer publicly accessible. You need to download the archives externally and place them in the root directory.

Appreciate for helping