Cannot install any packages starting with '@'

[markpradhan]

Do you want to request a feature or report a bug?
Bug

What is the current behavior?
Cant install any packages starting with '@'

If the current behavior is a bug, please provide the steps to reproduce.
yarn install or yarn

yarn install v1.12.3
info No lockfile found.
[1/4] 🔍  Resolving packages...
error Couldn't find package "@sentry/browser" on the "npm" registry.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

What is the expected behavior?
Simply install the packages

Please mention your node.js, yarn and operating system version.
Tried node 8.x 9.x 10.x, yarn 1.12.3, macOS 10.14.1

I tried removing yarn.lock, changing registry to npm.
yarn add @... doesn't work either.

Looks like others have issues upgrading as well:
#6727

Did some more testing:
yarn add uuid -> works
yarn add @sentry/browser -> fails

Npm seems affected as well:
npm install uuid -> works
npm install @sentry/browser ->

npm ERR! code E401
npm ERR! 401 Unauthorized: @sentry/[email protected]

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/mark/.npm/_logs/2018-11-28T11_43_45_028Z-debug.log

[arcanis]

Thanks for the report - merging it with #6727.

It seems to be a problem on npm's side:
https://npm.community/t/can-t-install-scoped-packages-e401-unauthorized/3631

[mtarapata]

Hi All,
In my case it helped when I deleted line with authToken from my .npmrc
progress=true
//registry.npmjs.org/:_authToken=xxxxxxxxxxxxxxxxxxx <-delete this

[nothingismagick]

Yes, this seems to be consensus:
#6312 (comment)