JupyterLab Notebook Not Running Properly

Hello, I am a new user. I am a student in a Python class. I am running JupyterLab (4.2.5) through Anaconda.Navigator.

I am working on a project right now. For some reason, and command that I try to execute will not work.

The same issue happened last week. I deleted the navigator, and re-downloaded the app. It is not working again this morning.

Does anyone know how to troubleshoot this issue?

Everytime that I attempt to execute a command, I get this notification. Could someone please help me?