Bluehost subdomain is not working on cloudflare

Recently I added my domain to Cloudflare. The main domain is working fine, but the sub domain isn’t working. I added the A record in the Cloudflare DNS.
Please help me, I waited for more than 12 hours.

According to the content of your picture, cloudflare is working properly. This prompt is the content returned by your server.

Can u please tell me what should I do now?

Check the website service configuration on your server.

Please can u be more specific about the configuration.

404 is displayed, indicating that the corresponding domain name is not bound or the website is not configured with the corresponding directory.