ModuleNotFoundError: No module named 'matplotlib'

This error message is indicating that the Python module named "matplotlib" is not installed on your system. "matplotlib" is a popular data visualization library in Python that is used to create various types of plots, graphs, and charts.

To resolve this error, you need to install the "matplotlib" module. You can install it using pip, which is a package manager for Python. Open your terminal or command prompt and run the following command:

pip install matplotlib

This will download and install the "matplotlib" module and its dependencies on your system. Once the installation is complete, you can import the "matplotlib" module in your Python code without any errors.