Unexpected Application Error!

Unable to preload CSS for https://refresher-public.s3.sa-east-1.amazonaws.com/build/assets/App.BlUoXJku.css

Error: Unable to preload CSS for https://refresher-public.s3.sa-east-1.amazonaws.com/build/assets/App.BlUoXJku.css
    at HTMLLinkElement.<anonymous> (https://refresher-public.s3.sa-east-1.amazonaws.com/build/entry/app.DbmqS0Ac.js:376:12839)