There is no bundle.js? when create-react-app scaffolding is running

No bundle.js? occurs when create-react-app scaffolding is running

clipboard.png

what does this mean?

Update:
react runs on http://localhost:3000, possibly with nginx reverse proxy configured. The nginx.conf configuration is as follows:

    server {
        listen       3001;
        server_name  localhost;

                        
        location / {
            proxy_pass http://localhost:3000;
        }


        location /api { 
            proxy_pass  http://192.168.33.3:8080;    
        }  

    }

how can I configure to solve the above errors?

Mar.24,2022
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