Issue is here: <a href="https://github.com/yarnpkg/yarn/issues/5885" rel="nofollow">https://github.com/yarnpkg/yarn/issues/5885</a><p>The problem is that npm just migrated their registry to use CloudFlare. Yarn already used CloudFlare, and had <a href="https://registry.yarnpkg.com" rel="nofollow">https://registry.yarnpkg.com</a> CNAME'd to <a href="https://registry.npmjs.org" rel="nofollow">https://registry.npmjs.org</a>. CloudFlare has a security restriction that one CloudFlare account cannot have DNS records pointing to another CloudFlare account, so npm moving to CloudFlare broke yarn's existing CNAME to npm's registry (thus breaking yarn).