@repo It seems like a proxy issue. Can you please try the following:
- Close the current jupyter-notebook server.
- Open the Anaconda Prompt and run the following commands
set HTTP_PROXY=http://10.0.0.5:3128
set HTTPS_PROXY=http://10.0.0.5:3128
set NO_PROXY=localhost,127.0.0.1
jupyter-notebook
Let me know if you face any issue even after this.