Notebook is not loading correctly

I have just installed Notebook 7.0.2 and by launching “Jupyter Notebook” in the terminal, a browser page opens with the Jupyter logo on the top left and nothing more.
In the terminal I see a couple of warnings that I having a hard time understanding:

[W 2023-08-30 12:04:51.409 JupyterNotebookApp] 404 GET /lab/api/settings/@jupyter-notebook/notebook-extension:scroll-output?1693389891399 (8948a5df3bdd422992e1557468ee49dc@::1) 1.45ms referer=http://localhost:8888/tree