# Common Errors and Their Solutions

## Permission denied when running npm run dev

When running the command `npm run dev`, from within `apps/rockmtn-platform`, for example, you could encounter the following error:

`sh: 1: next: Permission denied`

### Solutions

* This error can be thrown when you have failed to run `npm install` or `npm i` to install package dependencies. Be sure you have completed the entire **One-time Initial Setup Procedure** documented in `<project-root>/readme.md`

## ChunkLoadError: Loading chunk

Delete the `.next` folder, relaunch your project (e.g. `npm run dev`), and force-refresh your web page (SHIFT+ F5 / CMD + SHIFT+ R) to remove the cache.

## Module not found: Can't resolve 'glass-web-components/loader'

Example:

```
./pages/_app.js:11:0
Module not found: Can't resolve 'glass-web-components/loader'
   9 | // VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
  10 | // Enable use of Glass Web Components 1 of 2
> 11 | import {
  12 |     applyPolyfills,
  13 |     defineCustomElements,
  14 | } from 'glass-web-components/loader';

Import trace for requested module:

https://nextjs.org/docs/messages/module-not-found
```

This can happen after making a configuration change and failing to rebuild. Try running the command:

```
$ rush rebuild
```