Hosting content not showing?

Question

React

After the npm run build command, I brought the build folder into the public_html folder of the hosting. In the buiild folder there was a static folder with folders (css, js, media), these folders were smashed into the corresponding folders of the public_html folder
Site content is not displayed
In the console, an error

Answer 1

When working with react, you should not have css and js folders, try to use the generally accepted data structure with atoms, components, screens, src folders + upload to heroku so it's easier and faster.