执行yarn命令报错解决方案“error An unexpected error occurred: "https://registry.npm.taobao.org/”

也就是因为yarn和npm的源不一致，我们只要修改成一致的就行
因为yarn的源是
https://registry.npm.taobao.org
而npm的源是
https://registry.npm.org
查看npm的源

npm config get registry
修改npm源
方法一：
npm config set registry https://registry.npm.taobao.org npm config set disturl https://npm.taobao.org/dist
方法二：
yarn config set registry https://registry.npm.taobao.org/ yarn config set disturl https://npm.taobao.org/dist yarn config set sass-binary-site https://npm.taobao.org/mirrors/node-sass
添加 yarn源
yarn add taobao https://registry.npm.taobao.org/
代理问题：
yarn config rm proxy yarn config rm https-proxy