How can I troubleshoot this error by checking my project's dependencies?

First, run `npm list fs` or `yarn list fs` to see if the 'fs' module is listed as a dependency. If it's not, install it using `npm install fs` or `yarn add fs`. Also, check for any potential conflicts or outdated versions of related modules that might be causing the issue. Consider using `npm audit` or `yarn audit` to identify vulnerabilities and potential dependency conflicts.