网站转 https 失败，证书已获取但是 nginx 配置改了一天一直不对

买的阿里云服务器部署博客学习，做到升级 https 时遇到了困难。 系统：centos 项目: koa2 + vue + mongodb ssl 工具用的 certbot 申请的证书，已获取保存在服务器上，但是似乎配置 nginx.conf 时出了问题。 小白一枚不懂 nginx，之前都是照着网上的资料配的，求教- -

nginx.conf 代码

events {
    worker_connections 1024;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

        ssl_trusted_certificate "/etc/letsen#        ssl_session_cache shared:SSL:1m        include /etc/nginx/conf.d/*.conf;
    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  www.jiguojun.com;
            proxy_set_header Connection "";
            proxy_set_header X-NginX-Proxy true;
            proxy_set_header Host   $http_host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Real-IP  $remote_addr;
        location / {
        server_name  www.jiguojun.com;
        root         /usr/share/nginx/html

        include /etc/nginx/default.d/*.conf;
    
        location / {
            proxy_set_header X-Real-IP  $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host   $http_host;
            proxy_set_header X-NginX-Proxy true;
            proxy_set_header Connection "";
            proxy_http_version 1.1;
            proxy_pass http://127.0.0.1:3001;
        }

        location ^~ /.well-known/acme-challenge/ {
            default_type "text/plain";
            root     /usr/share/nginx/html;
        }
    }
    
    # Settings for a TLS enabled server.
    server {
        listen       443 ssl http2;
        listen       [::]:443 ssl http2;
        server_name  www.jiguojun.com;
        ssl          on;
        root         /usr/share/nginx/html;

        ssl_certificate "/etc/letsencrypt/live/www.jiguojun.com/fullchain.pem";
        ssl_certificate_key "/etc/letsencrypt/live/www.jiguojun.com/privkey.pem";
        
        include /etc/nginx/default.d/*.conf;

        location / {
            proxy_pass http://127.0.0.1:3001;
        }
    }

}