When i firstly install pytorch in jupyter notebook ,there is a problem?

i try to run those conmmands in anaconda3 prompt: 1.conda activate pytorch 2.conda install nb_conda
3.jupyter notebook then my conmmads run as follows:

This error seems to be unrelated to PyTorch and is apparently a fix for the tornado server inside of Jupyter for Windows users.
I would recommend to try to update asyncio and if that doesn’t help, create an issue on the jupyter repository.