Jupterlab errors

File “/usr/bin/jupyter”, line 11, in
load_entry_point(‘jupyter-core==4.6.3’, ‘console_scripts’, ‘jupyter’)()
File “/usr/lib/python3/dist-packages/jupyter_core/command.py”, line 247, in main
command = _jupyter_abspath(subcommand)
File “/usr/lib/python3/dist-packages/jupyter_core/command.py”, line 133, in _jupyter_abspath
raise Exception(
Exception: Jupyter command jupyter-lab not found.

How to resolve this error in resolving to activate Jupiter Lab on Ubuntu 20.04 ? Appreciate an early feedback