Error while launching jupyter notebook

What to do when
Traceback (most recent call last):
File “C:\Users\user\anaconda3\Scripts\jupyter-notebook-script.py”, line 6, in
from notebook.notebookapp import main
ModuleNotFoundError: No module named ‘notebook.notebookapp’
error occurs while launching jupyter notebook from anaconda?

Seems like notebook is not there in your conda environment. Install it using conda install -c anaconda notebook