No module named 'jupyter_contrib_core'

This error message suggests that the required module "jupyter_contrib_core" is missing from your Python environment. To resolve this error, you can try installing the module using pip, which is a package manager for Python. To do this, open a command prompt or terminal window and enter the following command:

pip install jupyter_contrib_core

This should install the module and allow you to use it in your Jupyter notebooks. If you continue to encounter issues, you may need to check that your Python environment is properly configured and that your Jupyter installation is up-to-date.