Solved by ptrblck in post #4 
              
              
                Based on the output it seems your torchvision version was downgraded to 0.2.2: 
torchvision {0.8.1 (pytorch/win-64) -> 0.2.2 (pytorch/noarch)}

and I’m unsure why this would happen. Could you create a new virtual environment and reinstall the latest lib versions? 

I would generally recommend to upd…