title: React app created using create-react-app failing to start, returns error
body: <p>I used create-react app to create a new react application, when I try to start it using the command <code>npm start</code>, it returns the following error:</p>
  
  <pre><code>&gt; warbler-client@0.1.0 start 
  /mnt/c/Users/Debchakra/Desktop/warbler/warbler-client
  &gt; react-scripts start
  
  
  There might be a problem with the project dependency tree.
  It is likely not a bug in Create React App, but something you need to fix 
  locally.
  
  The react-scripts package provided by Create React App requires a 
  dependency:
  
    "webpack": "4.28.3"
  
  Don't try to install it manually: your package manager does it 
  automatically.
  However, a different version of webpack was detected higher up in the 
  tree:
  
    /mnt/c/Users/Debchakra/node_modules/webpack (version: 4.29.5)
  
  Manually installing incompatible versions is known to cause hard-to-debug 
  issues.
  
  If you would prefer to ignore this check, add SKIP_PREFLIGHT_CHECK=true to 
  an .env file in your project.
  That will permanently disable this message but you might encounter other 
  issues.
  
  To fix the dependency tree, try following the steps below in the exact 
  order:
  
    1. Delete package-lock.json (not package.json!) and/or yarn.lock in your 
  project folder.
    2. Delete node_modules in your project folder.
    3. Remove "webpack" from dependencies and/or devDependencies in the 
  package.json file in your project folder.
    4. Run npm install or yarn, depending on the package manager you use.
  
  In most cases, this should be enough to fix the problem.
  If this has not helped, there are a few other things you can try:
  
    5. If you used npm, install yarn (http://yarnpkg.com/) and repeat the 
  above steps with it instead.
       This may help because npm has known issues with package hoisting 
  which may get resolved in future versions.
  
    6. Check if /mnt/c/Users/Debchakra/node_modules/webpack is outside your 
  project directory.
       For example, you might have accidentally installed something in your 
  home folder.
  
    7. Try running npm ls webpack in your project folder.
       This will tell you which other package (apart from the expected 
  react-scripts) installed webpack.
  
  If nothing else helps, add SKIP_PREFLIGHT_CHECK=true to an .env file in 
  your project.
  That would permanently disable this preflight check in case you want to 
  proceed anyway.
  
  P.S. We know this message is long but please read the steps above :-) We 
  hope you find them helpful!
  
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! warbler-client@0.1.0 start: `react-scripts start`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the warbler-client@0.1.0 start script.
  npm ERR! This is probably not a problem with npm. There is likely 
  additional logging output above.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     /home/webdeb/.npm/_logs/2019-03-26T06_44_19_294Z-debug.log
  </code></pre>
  
  <p>I tried all the steps mentioned above, like install yarn and all that, but it always shows the same error.</p>
  
  <p>Previously, I have used create-react-app inside if cloud9, it worked fine then, but now I am doing it on my local system. And I actually using WSL. (if that helps)</p>