This error message usually indicates that the module you are trying to import, webpack, is not installed in your project. Here are some steps you can take to resolve this issue:

1. Check if webpack is installed: You can use the npm command to check if webpack is installed in your project. Open a terminal window and run the following command:

npm ls webpack

If webpack is installed, it should return the path to the installed module.

1. Install webpack: If webpack is not installed, you can install it using the following command:

npm install webpack

1. Verify that webpack is installed: After installing webpack, you can verify that it is installed by running the following command:

webpack --version

If webpack is installed, it should return the version number.

If you have already tried these steps and are still getting the error message, it's possible that there is a configuration issue with your webpack configuration file. You can try opening the webpack configuration file in a text editor and making sure that all the required dependencies are installed and that the correct paths to the dependencies are specified.