Unexpected Application Error!

Unable to preload CSS for https://static-nginx-online.fbcontent.cn/sky-official-web-static/assets/index.ef1193d8.css

Error: Unable to preload CSS for https://static-nginx-online.fbcontent.cn/sky-official-web-static/assets/index.ef1193d8.css
    at HTMLLinkElement.<anonymous> (https://static-nginx-online.fbcontent.cn/sky-official-web-static/assets/index.cce108f0.js:1:2005)