Error: Cannot find module 'webpack'

This error occurs when the module 'webpack' is not installed or cannot be found in the project directory.

To resolve this error, you can follow these steps:

1. Check if 'webpack' is listed in the dependencies or devDependencies section in the project's package.json file. If it is not listed, run the following command in the terminal to install it:

npm install webpack --save-dev

2. If 'webpack' is already installed, try deleting the node_modules folder and running the following command to reinstall all the dependencies:

rm -rf node_modules
npm install

3. If the above steps do not work, try installing 'webpack' globally by running the following command:

npm install -g webpack

Note: Installing 'webpack' globally is not recommended as it may lead to version conflicts with other projects. It is always better to install it as a project dependency using the first method.