My bundler (Webpack/Parcel) isn't resolving 'web-vitals'. How do I fix this?

Bundlers sometimes have configuration issues. Ensure your bundler is configured to correctly resolve modules from `node_modules`. For Webpack, check your `resolve.modules` configuration. For Parcel, it usually works out-of-the-box, so verify your project structure and dependencies. Try restarting your development server after making changes.