No module named 'flask_cors'

The error message "No module named 'flask_cors'" indicates that the Flask extension "flask_cors" is not installed in your Python environment. To fix this error, you can install the "flask_cors" package using pip, the Python package manager, by running the following command in your terminal or command prompt:

pip install flask_cors

Once the installation is complete, you should be able to import and use the "flask_cors" module in your Flask application without any issues.