What could be the reasons if jupyterlab ain’t displaying output from cells that previously worked fine? The kernel starts normally, and there are no error messages, but the output just doesn’t show up. Is this a common that you ever face? If so, how did you troubleshoot it?
You’d need to provide more details so that we know what you are asking about.
What kind of output? 2 + 2? Plots? Everything?
Normally screenshots are frowned upon. However, for behaviors or things that are hard to describe well, they can help.