Unexpected Application Error!

Unable to preload CSS for /assets/static/css/status_tables-BtdWMjsT.css

Error: Unable to preload CSS for /assets/static/css/status_tables-BtdWMjsT.css
    at HTMLLinkElement.<anonymous> (https://www.fmz.com/assets/static/js/index-Dt-8Yswi.js:253:19522)