Error when creating a new project

[SeanBannister]

Is this a bug report?

Yes

Can you also reproduce the problem with npm 4.x?

This bug is not reproducible with NPM. It only affects create-react-app when Yarn is installed.

Environment

1. node -v: 6.11.0

2. npm -v: 4.6.1

3. yarn --version:
   Tested with:
   0.27.5
   0.26.0
   0.25.1

4. npm ls react-scripts: Not applicable, doesn't get this far to check.

5. Operating system:
   Windows 8.1 Pro

Steps to Reproduce

1. Install create-react-app npm install -g create-react-app
2. Install yarn via the windows .msi file.
3. Open command prompt and run: create-react-app myapp

Expected Behavior

New project is created.

Actual Behavior

The following error is encountered.

Aborting installation.
Unexpected error. Please report it as a bug:
{ Error: Cannot find module 'L:\myapp\node_modules\react-scripts\scripts\init.js'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at getPackageName.then.then.then.packageName (C:\Users\Sean\AppData\Roaming\npm\node_modules\create-react-app\createReactApp.js:298:20)
    at process._tickCallback (internal/process/next_tick.js:109:7) code: 'MODULE_NOT_FOUND' }

Full output from the command line here.

As mentioned above this only happens when Yarn is installed and therefore create-react-app uses it for creating the project. If I uninstall Yarn the process completes successfully with NPM.

I'm looking for guidance on how I should attempt to debug this. This might end up being a Yarn issue.

[gaearon]

Install create-react-app 1.3.3 via the Windows .msi file.

I didn't fully get that part. Where did you find this .msi file?

[SeanBannister]

Sorry I clearly wasn't thinking when I typed that, here's what I meant to write:

Steps to Reproduce

1. Install create-react-app npm install -g create-react-app
2. Install yarn via the windows .msi file.
3. Open command prompt and run: create-react-app myapp

[gaearon]

I’d appreciate if you could cross-post this in Yarn repo.
I don’t think it’s a bug on our side, but we’ll want to keep track of it.

[jeredmasters]

I get this same error without yarn
create-react-app@1.3.3
react@15.6.1
react-scripts@1.0.10
Windows 10, fresh install
Npm 3.10.10
Node 6.11.1

npm install -g create-react-app
create-react-app testapp

Aborting installation.
Unexpected error. Please report it as a bug:
{ Error: Cannot find module 'C:\Users\jered\Documents\Projects\react\testapp\node_modules\react-scripts\package.json'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at checkNodeVersion (C:\Users\jered\AppData\Roaming\npm\node_modules\create-react-app\createReactApp.js:479:23)
    at getPackageName.then.then.then.packageName (C:\Users\jered\AppData\Roaming\npm\node_modules\create-react-app\createReactApp.js:288:7)
    at process._tickCallback (internal/process/next_tick.js:109:7) code: 'MODULE_NOT_FOUND' }```

[andywillis]

@gaearon , I'm getting this error with npm v3/4/5 (node v6 and 8), and yarn (npm uninstalled), Windows 7 x64. At first I thought it was an issue with my network connection, or a problem with npm, or my virus checker, but npm/yarn will quite happily install something like preact-cli without any problems. It's got me completely foxed because it worked fine in the past.

It never aborts in the same place in the installation, but it's always the same error:

Aborting installation.
Unexpected error. Please report it as a bug:
{ Error: Cannot find module 'C:\Users\XXX\Development\WIP\newapp\node_modules\react-scripts\package.json'
    at Function.Module._resolveFilename (module.js:485:15)
    at Function.Module._load (module.js:437:25)
    at Module.require (module.js:513:17)
    at require (internal/module.js:11:18)
    at checkNodeVersion (C:\Users\XXX\AppData\Roaming\npm\node_modules\create-react-app\createReactApp.js:476:23)
    at getPackageName.then.then.then.packageName (C:\Users\XXX\AppData\Roaming\npm\node_modules\create-react-app\createReactApp.js:285:7)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7) code: 'MODULE_NOT_FOUND' }

[Timer]

Can you try clearing your npm and Yarn cache?

[andywillis]

Yes. I tried that too. Same error, but this time it aborted immediately instead of running through a few packages first.

Andy@Home MINGW64 ~/Development/WIP                                                                                         
$ npm cache clear                                                                                                           
                                                                                                                            
Andy@Home MINGW64 ~/Development/WIP                                                                                         
$ create-react-app newapp                                                                                                   
                                                                                                                            
Creating a new React app in C:\Users\Andy\Development\WIP\newapp.                                                           
                                                                                                                            
Installing packages. This might take a couple of minutes.                                                                   
Installing react, react-dom, and react-scripts...                                                                           
                                                                                                                            
[..................] | loadRequestedDeps: verb cache add spec react-dom                                                     
Aborting installation.                                                                                                      
Unexpected error. Please report it as a bug:                                                                                
{ Error: Cannot find module 'C:\Users\Andy\Development\WIP\newapp\node_modules\react-scripts\package.json'                  
    at Function.Module._resolveFilename (module.js:485:15)                                                                  
    at Function.Module._load (module.js:437:25)                                                                             
    at Module.require (module.js:513:17)                                                                                    
    at require (internal/module.js:11:18)                                                                                   
    at checkNodeVersion (C:\Users\Andy\AppData\Roaming\npm\node_modules\create-react-app\createReactApp.js:476:23)          
    at getPackageName.then.then.then.packageName (C:\Users\Andy\AppData\Roaming\npm\node_modules\create-react-app\createReac
tApp.js:285:7)                                                                                                              
    at <anonymous>                                                                                                          
    at process._tickCallback (internal/process/next_tick.js:188:7) code: 'MODULE_NOT_FOUND' }                               

[lifehome]

I am also seeing this, can reproduce the bug through @andywillis steps.

Note: yarn is not installed.

To reproduce:

1. npm cache clear
2. npm i -g create-react-app
3. cd ~/workspace
4. create-react-app myapp
5. The following happens both thru terminal and WebStorm...

Installing packages. This might take a couple of minutes.
Installing react, react-dom, and 1.0...

+ react-dom@16.2.0
+ react@16.2.0
+ 1.0@1.0.2
added 208 packages in 19.886s

Aborting installation.
Unexpected error. Please report it as a bug:
{ Error: Cannot find module '/Users/lifehome/WebstormProjects/untitled/node_modules/1.0/scripts/init.js'
    at Function.Module._resolveFilename (module.js:536:15)
    at Function.Module._load (module.js:466:25)
    at Module.require (module.js:579:17)
    at require (internal/module.js:11:18)
    at getPackageName.then.then.then.packageName (/usr/local/lib/node_modules/create-react-app/createReactApp.js:305:20)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7) code: 'MODULE_NOT_FOUND' }

Deleting generated file... node_modules
Deleting generated file... package.json
Done.
Done

[gaearon]

We can't help more since the error is so transient. It might be caused by a buggy npm or Yarn version, a bad npm registry proxy, a bad internet connection, etc.