A kernel error occurs basically when you try opening a python 3 file in the wrong directory. The truth is Jupyter and Python are two different software entirely. So, a kernel error occurs when Jupyter fails to connect with a specific version of Python.
I have tried all of the steps in the linked article with the exception of contacting support. I have been able to get the error to go away randomly, but it comes back randomly as well.
I found this article on the Support page for the Kernel error that may help you troubleshoot the issue.
I have a B230 printer which is giving me some trouble. It keeps giving a "Kernel Error [900.00]". When the printer is "working", I send a test print and all I get is a single line of random ascii characters at the top of multiple pages.
I have tried the official drivers from Xerox with no change. I can not find anything online about this, so I'm hoping someone here can help me.