bootstrap-grid - 加载资源失败：服务器响应状态为 404 (Not Found) bootstrap-grid.css:1

Question

如何解决这些错误？

在theme-style.css中有这个代码

@charset "UTF-8";
@import "bootstrap-grid.css";
@import "icons.css";
@import 'https://fonts.googleapis.com/css?family=Raleway:300,400,500,600,700';
@import 'https://fonts.googleapis.com/css?family=Open+Sans:500,600,700';