[百思不得其解] Nginx 连接已重置 ERR_CONNECTION_RESET

首先说明，域名确定没有被 Q ！
服务器只开放了 443 端口，Nginx 配置如下：

server { listen 443 ssl http2 fastopen=3 reuseport; server_name abc.com; add_header X-Frame-Options "DENY"; add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload"; ssl_certificate /usr/local/nginx/ssl/abc.pem; ssl_certificate_key /usr/local/nginx/ssl/abc.key; ssl_dhparam /etc/ssl/certs/dhparam.pem; ssl_session_cache shared:SSL:5m; ssl_session_timeout 5m; ssl_protocols TLSv1.2 TLSv1.3; ssl_early_data on; ssl_prefer_server_ciphers on; location / { root html; aio threads; index index.php; } location ~ \.php$ { root html; fastcgi_pass unix:/usr/local/php/php-fpm.sock; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param HTTPS $https; include fastcgi_params; } } 

访问 https://abc.com 总是连接已重置 ERR_CONNECTION_RESET，求大神指点迷津啊！！