当我尝试在使用yarn的React应用程序中安装sass-loader依赖项的同时安装node-sass时，出现了以下错误：
我已经有最新版本的yarn和npm。同样的命令几天前似乎可以使用。但现在无法工作。现在我必须切换到
以下是我的依赖项：
yarn add v1.22.0
[1/4] Resolving packages...
warning node-sass > request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
warning node-sass > node-gyp > request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
error Couldn't find package "error-ex" on the "npm" registry.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
我已经有最新版本的yarn和npm。同样的命令几天前似乎可以使用。但现在无法工作。现在我必须切换到
dart-sass而不是node-sass。我通常在安装依赖时不指定版本。这个错误和那个有关吗？以下是我的依赖项：
"dependencies": {
"@babel/core": "^7.8.4",
"@babel/plugin-proposal-class-properties": "^7.8.3",
"@babel/preset-env": "^7.8.4",
"@babel/preset-react": "^7.8.3",
"babel-loader": "^8.0.6",
"css-loader": "^3.4.2",
"normalize.css": "^8.0.1",
"react": "^16.12.0",
"react-dom": "^16.12.0",
"react-router-dom": "^5.1.2",
"sass": "^1.25.0",
"sass-loader": "^8.0.2",
"style-loader": "^1.1.3",
"webpack": "^4.41.6",
"webpack-dev-server": "^3.10.3"
},
"devDependencies": {
"webpack-cli": "^3.3.11"
}