title: An unexpected error occurred: "https://registry.yarnpkg.com/error-ex/-/error-ex-1.3.2.tgz: Request failed \"404 Not Found\"
body: <p>When I try to create a new react app with create-react-app, I got the following:</p>
  
  <pre><code>» npx create-react-app my-order
  
  Creating a new React app in /Users/ian/myproject/my-order.
  
  Installing packages. This might take a couple of minutes.
  Installing react, react-dom, and react-scripts...
  
  yarn add v1.19.0
  [1/4]   Resolving packages...
  [2/4]   Fetching packages...
  error An unexpected error occurred: "https://registry.yarnpkg.com/error-ex/-/error-ex-1.3.2.tgz: Request failed \"404 Not Found\"".
  info If you think this is a bug, please open a bug report with the information provided in "/Users/ian/myproject/my-order/yarn-error.log".
  info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
  
  Aborting installation.
    yarnpkg add --exact react react-dom react-scripts --cwd /Users/ian/myproject/my-order has failed.
  
  Deleting generated file... package.json
  Deleting generated file... yarn.lock
  Done.
  </code></pre>
  
  <p>And my local environment information is like this:</p>
  
  <pre><code>» npx create-react-app --info
  
  Environment Info:
  
    System:
      OS: macOS 10.14.6
      CPU: x64 Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
    Binaries:
      Node: 11.1.0 - /usr/local/bin/node
      Yarn: 1.19.0 - ~/.yarn/bin/yarn
      npm: 6.7.0 - /usr/local/bin/npm
    Browsers:
      Chrome: 80.0.3987.100
      Firefox: 72.0.2
      Safari: 12.1.2
    npmPackages:
      react: Not Found
      react-dom: Not Found
      react-scripts: Not Found
    npmGlobalPackages:
      create-react-app: 2.1.1
  </code></pre>
  
  <p>Anyone have any idea what's going on here?</p>