thank you for the quick response.
I just solved the problem by deleting my Conda environment and reinstalling it.
In both, old and new, environments I was using: pytorch-ignite 0.4.2 and MONAI 0.3.0+95.g535561e.
I did install simpleITK and ITK packages about an hour before pytorch started breaking, but I was able to start my script in-between without it crashing.