Connection to the Jupyter Notebook Server could not be established

For the past many months I am trying to code in Jupyter Notebook but whenever I open Jupyter Notebook, then, I see a message where it is written 'A connection to the notebook server could not be established. The notebook will continue trying to reconnect. Check your network connection or notebook server configuration.'

I ran Juypter Notebook in both normal way and in Administrator in powershell but then also, it did not worked.

I even uninstalled Jupyter Notebook and reinstalled it again.

The thing which I see when I first open Jupyter Notebook:-

The image showing 'kernel connection failed'