If you're seeing the "A record for the domain is missing" error while generating an SSL certificate, even though the DNS settings seem correct, it could be due to DNS propagation delay (which can take up to 24 hours). Use tools like Google Admin Toolbox or MXToolBox to check if your domain resolves correctly. If you're using Cloudflare, disable the proxy (set it to "DNS only") during SSL validation. Also, check for IPv6 (AAAA) conflicts if your server doesn’t support it. If DNS validation keeps failing, try using HTTP-based validation if your panel allows it.