yarn-error.log

Arguments: 
  /usr/bin/node /usr/share/yarn/bin/yarn.js add -D Vuepress

PATH: 
  /home/christy/anaconda3/bin:/home/christy/anaconda3/bin:/home/christy/anaconda3/bin:/home/christy/bin:/home/christy/.local/bin:/home/christy/anaconda3/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/cuda/bin:/usr/lib/nvidia-396/:~/flutter_sdk/flutter/bin:/usr/local/cuda/bin:/usr/lib/nvidia-396/:~/flutter_sdk/flutter/bin

Yarn version: 
  1.17.3

Node version: 
  8.16.0

Platform: 
  linux x64

Trace: 
  Error: https://registry.yarnpkg.com/Vuepress: Not found
      at Request.params.callback [as _callback] (/usr/share/yarn/lib/cli.js:66830:18)
      at Request.self.callback (/usr/share/yarn/lib/cli.js:140464:22)
      at emitTwo (events.js:126:13)
      at Request.emit (events.js:214:7)
      at Request.<anonymous> (/usr/share/yarn/lib/cli.js:141436:10)
      at emitOne (events.js:116:13)
      at Request.emit (events.js:211:7)
      at IncomingMessage.<anonymous> (/usr/share/yarn/lib/cli.js:141358:12)
      at Object.onceWrapper (events.js:313:30)
      at emitNone (events.js:111:20)

npm manifest: 
  No manifest

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile