Jupyter notebook extremely slow when connected to a remote server and used on local server by ssh tunneling

[smriti-singh]

I followed these steps to connect to jupyter notebook hosted on a remote server onto my local server:
https://www.digitalocean.com/community/tutorials/how-to-install-run-connect-to-jupyter-notebook-on-remote-server

Summary of steps:
1)Installed jupter notebook on ubuntu remote server
2)Installed cygwin on local computer- windows OS
3)On cmd typed: :ssh -N -f -L 8000:localhost:9000 usernme5@remote host url/ip address
4)It opens jupyter notebook
5)BUT when I create a new notebook or open a pre-existing notebook, it takes 30min or more to load. Even if the notebook loads, a simple "import numpy as np", takes indefinite time to execute
6)Meanwhile the error on the cmd is as follows:

And this is the jupyter notebook screen:

I do not understand the warning or how I can fix this. Please help?

[smriti-singh]

Just got these additional errors on the terminal while waiting for the notebook to execute: