@ketterrm presumably you are trying to run that dlinano container on JetPack 5 and Jetson Orin Nano, however it was intended for JetPack 4 and the original Jetson Nano. Unofficially you could copy the notebooks from the container (or from a fork like here) and run them in another container built for JetPack 5 that has similar components like JupyterLab (i.e. l4t-ml)
In reality though, since that DLI course is for the original Nano, I’d just recommend proceeding to the Hello AI World portion of the AI Fundamentals course instead (which is supported on JetPack 5 / Orin / ect)