docs: add mention of the useUploadHandlers error and steps to remedy it with a mention to monorepos (#14233)

Closes #13353

Updated documentation to mention the `useUploadHandlers` error, most
commonly triggered in monorepos where different apps end up resolving to
different dependencies in particular of nextjs or react

---------

Co-authored-by: German Jablonski <[email protected]>

Author: paulpopus

docs/troubleshooting/troubleshooting.mdx

@@ -111,6 +111,18 @@ pnpm dedupe
 
 Absolute last resort: add Webpack aliases so that all imports of a given package resolve to the same path (e.g. `resolve.alias['react'] = path.resolve('./node_modules/react')`). Keep this only until you can fix the underlying version skew.
 
+### Monorepos
+
+Another error you might see is the following or similarly related to hooks, in particular when `next` versions are mismatched:
+
+```bash
+useUploadHandlers must be used within UploadHandlersProvider
+```
+
+This is a common pitfall when using a monorepo setup with multiple packages. In this case, ensure that all packages in the monorepo use the same version of `payload`, `@payloadcms/*`, `next`, `react`, and `react-dom`. You can use pnpm with workspaces to manage dependencies across packages in a monorepo effectively. Unfortunately this error becomes harder to debug inside a monorepo due to how package managers hoist dependencies as well as resolve them.
+
+If you've pinned the versions and the error persists we recommend removing `.next/`, `node_modules/` and if possible deleting the lockfile and re-generating it to ensure that all packages in the monorepo are using the same version of the dependencies mentioned above.
+
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