Invalid options: child "files" fails because [child "json" fails because ["json" must be an object]]

[SevenOutman]

Version

3.0.0-rc.5

Reproduction link

http://localhost:8001

Steps to reproduce

• Install latest vue-cli via npm install -g @vue/cli
• Check version vue --version, outputs 3.0.0-rc.5
• Run vue ui

What is expected?

Normal outputs

What is actually happening?

$ vue ui
🚀  Starting GUI...
🌠  Ready on http://localhost:8001
Error: Invalid options: child "files" fails because [child "json" fails because ["json" must be an object]]
    at PluginApi.describeConfig (/usr/local/lib/node_modules/@vue/cli/node_modules/@vue/cli-ui/apollo-server/api/PluginApi.js:156:21)
    at module.exports.api (/Users/Doma/Developer/WebstormProjects/vue-locale/node_modules/@vue/cli-plugin-eslint/ui.js:3:7)
    at runPluginApi (/usr/local/lib/node_modules/@vue/cli/node_modules/@vue/cli-ui/apollo-server/connectors/plugins.js:227:7)
    at plugins.forEach.plugin (/usr/local/lib/node_modules/@vue/cli/node_modules/@vue/cli-ui/apollo-server/connectors/plugins.js:167:33)
    at Array.forEach (<anonymous>)
    at Timeout.setTimeout [as _onTimeout] (/usr/local/lib/node_modules/@vue/cli/node_modules/@vue/cli-ui/apollo-server/connectors/plugins.js:167:15)
    at ontimeout (timers.js:498:11)
    at tryOnTimeout (timers.js:323:5)
    at Timer.listOnTimeout (timers.js:290:5)

and the same stacktrace message repeats

---

Looks like something wrong with the plugins system, but Refresh Plugins API doesn't help

[yyx990803]

Please provide more information - OS, package manager, Node version...

[SevenOutman]

@yyx990803 It's Node v8.11.3 with npm v5.6.0 on a macOS 10.13.6 machine.

FYI these are the plugins I've installed in the only project managed with Vue UI:

[yyx990803]

I just did a fresh install with the exact same environment and it's working as expected. Closing as we cannot reproduce the behavior unless more information can be provided.

[SevenOutman]

@yyx990803 The errors were thrown from @vue/cli-plugin-eslint@3.0.0-beta.15, @vue/cli-plugin-pwa@3.0.0-beta.15 and @vue/cli-plugin-e2e-cypress@3.0.0-beta.15, and are now resolved by manually upgrading them to latest.

[terean-dspd]

And...
step 1: npm update
step 2: npm uninstall -g @vue/cli
sted 3: npm install -g @vue/cli

Finaly helped me