模块构建失败: 错误: 模块系统需要 emitFile 在 Object.module.exports

在导入 element-ui 时出现了这个问题。 ERROR in ./~/element-ui/lib/theme-chalk/fonts/element-icons.woff Module build failed: Error: emitFile is required from module system at Object.module.exports (D:\jsSpace\rent-house\vue2-happyfri\node_modules\file-loader\index.js:9:27) at Object.loader (D:\jsSpace\rent-house\vue2-happyfri\node_modules\\\\url-loader\dist\index.js:76:19) @ ./~/css-loader!./~/element-ui/lib/theme-chalk/index.css 6:811-848