Version

3.0.0-rc.4

Reproduction link

https://github.com/vuejs/vue-cli

Steps to reproduce

I updated @vue/cli from rc.2 to rc.4 Running vue ui no longer works, it gives the error message posted below.

What is expected?

vue ui will start when running vue ui

What is actually happening?

I get an error "Error: Cannot find module 'read-pkg'"
PS C:\Users\Brandon> vue ui
🚀 Starting GUI...
ERROR Error: Cannot find module 'read-pkg'
Error: Cannot find module 'read-pkg'
at Function.Module._resolveFilename (module.js:547:15)
at Function.Module._load (module.js:474:25)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
at Object. (C:\Users\Brandon\AppData\Roaming\npm\node_modules@vue\cli\node_modules@vue\cli-ui\apollo-server\connectors\folders.js:5:17)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)

I attempted to uninstall then reinstall the global @vue/cli package, same issue.