根据其他的回答，这条消息似乎有很多原因，我想我只是分享我的个人解决方案，以防将来有人有我的确切问题。

Our site loads the CSS files from an AWS Cloudfront distribution, which uses an S3 bucket as the origin. This particular S3 bucket was kept synced to a Linux server running Jenkins. The sync command via s3cmd sets the Content-Type for the S3 object automatically based on what the OS says (presumably based on the file extension). For some reason, in our server, all the types were being set correctly except .css files, which it gave the type text/plain. In S3, when you check the metadata in the properties of a file, you can set the type to whatever you want. Setting it to text/css allowed our site to correctly interpret the files as CSS and load correctly.

将匿名身份验证凭据设置为应用程序池标识对我来说很有用。

我开始得到这个问题今天只在chrome和safari相同的项目/url为我的goormide容器(node.js)

在尝试了上面的几个建议之后，它们似乎不起作用，并且回溯了我从昨天到今天所做的一些代码更改，这也没有什么区别，我最终在chrome设置中单击:

1.设置;

2.向下滚动至底部，选择:“高级”;

3.向下滚动到底部，选择:“恢复设置到原始默认值”;

这似乎已经解决了这个问题，因为我不再在控制台中得到警告/错误，页面显示为它应该。阅读上面的帖子，似乎这个问题可以从任何数量的来源发生，所以设置重置是一个潜在的通用修复。 干杯

以防有人来到这个帖子，有类似的问题。我也遇到过类似的问题，但是解决方法很简单。

一名开发人员错误地丢失了一份网页副本。将config文件放到CSS目录下。删除后，所有错误都得到解决，页面正常显示。

I faced the same issue while configuring Postfix Admin 3.2. According to the official documentation, the whole Postfix Admin content should be extracted into a separate directory, i.e. /srv/postfixadmin and not the document root. Only the /srv/postfixadmin/public directory should be symlinked into /var/www/html document root. I have just extracted the whole content into /var/www/html. Having played with Nginx server block settings, I managed example.com/postfixadmin resolving from /var/www/html/postfixadmin/public. Nevertheless, images and CSS were not available with 404 status code. The stylesheets were broken. I got the error message OP quoted with respective 404 entries in access log.

在我的情况下，我只是移动/var/www/html/postfixadmin到/srv/postfixadmin和ln -s /srv/postfixadmin/公共/var/www/html/postfixadmin。这完全解决了问题。 这是参考资料。

试试这个<link rel="stylesheet" type="text/css" href="../##/yourcss.css">

哪里##是你的文件夹，其中是你的。css -文件

别忘了:..(双点)。