Jupyter is not working properly

[brunolelli]

suddently, with no error message, nothing, jupyter stops working

Are their any error messages?
Mighty hard to pinpoint a reason for the termination without seeing the script.

I know it's a very tough question, but the fact is that jupyter really stops working suddently, with no error message, no icon change, nothing. Even the hourglass icon keeps "showing" the system is running, but the fact is that it's not!