Gatsby: Error: Cannot find module 'graphql'

[aalenliang]

Description

After running command to start my new project:

npm install --global gatsby-cli
cd Documents
gatsby new my-app
cd my-app
gatsby develop

I got an error:

error There was a problem loading the local develop command. Gatsby may not be installed. Perhaps you need to run "npm install"?


  Error: Cannot find module 'graphql'

  - module.js:11 require
    internal/module.js:11:18

  - index.js:18 Object.<anonymous>
    [my-app]/[express-graphql]/dist/index.js:18:16

  - module.js:11 require
    internal/module.js:11:18

  - develop.js:17 Object.<anonymous>
    [my-app]/[gatsby]/dist/commands/develop.js:17:21

However, running npm install or rm -rf node_modules and reinstall doesn't work for me.

If i create project based on another starter, it works fine.

gatsby new gatsby-site https://github.com/gatsbyjs/gatsby-starter-hello-world

Environment

  System:
    OS: macOS High Sierra 10.13.6
    CPU: x64 Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 8.11.3 - /usr/local/bin/node
    npm: 5.6.0 - /usr/local/bin/npm
  Browsers:
    Chrome: 68.0.3440.106
    Firefox: 61.0.2
    Safari: 11.1.2
  npmPackages:
    gatsby: ^2.0.0 => 2.0.0
    gatsby-plugin-manifest: ^2.0.2 => 2.0.2
    gatsby-plugin-offline: ^2.0.5 => 2.0.5
    gatsby-plugin-react-helmet: ^3.0.0 => 3.0.0
  npmGlobalPackages:
    gatsby-cli: 2.4.0

[kakadiadarpan]

@aalenliang Can you try npm install after removing package-lock.json, yarn.lock and node_modules/?

I'm unable to reproduce this with the steps that you provided.

[aalenliang]

Hi, I upgrade my npm to 6.4.1, uninstall gatsby globally, and redo the steps.
now it works fine.

Not sure what's wrong. I'll close this issue. Thank you for your reply.

[DanceParty]

Yup happening to me too...

EDIT:

• Removing Gatsby-CLI
• Updating npm to latest version
• Installing Gatsby-CLI again

this fixed it for me