--- title: '`next-head-count` is missing' --- ## Why This Error Occurred You have a custom `pages/_document.js` that doesn't have the components required for Next.js to render correctly. ## Possible Ways to Fix It Ensure that your `_document.js` is importing and rendering all of the [required components](/docs/pages/building-your-application/routing/custom-document). In this case you are most likely not rendering the `` component imported from `next/document`.