这边测试正常，如果一直都这样，请提供复现步骤

用这个nginx 部署完 报的错

server {

listen 80;

server_name demo.jeelowcode.com;

client_max_body_size     50m;

location / {

            add_header Cache-Control no-store;

# 重定向所有HTTP请求到HTTPS

        return 301 https://$server_name$request_uri;

}

}

server {

   server_name demo.jeelowcode.com;

   listen      443;

   client_max_body_size     500m;

   root    /data/mjkj/webapp/demo_jeelowcode/web/dist;

   # 设置客户端 IP 头

   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

   proxy_set_header X-Real-IP $remote_addr;

   proxy_set_header Host $host;

   location / {

       index   index.html index.htm;

       try_files  $uri $uri/ /index.html;

   }

   location /api/ {

       proxy_pass http://127.0.0.1:48080/;

       add_header Cache-Control no-store;

       # 支持 WebSocket

       proxy_http_version 1.1;

       proxy_set_header Upgrade $http_upgrade;

       proxy_set_header Connection "Upgrade";

       # 确保传递客户端 IP

       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

       proxy_set_header X-Real-IP $remote_addr;

       proxy_set_header Host $host;

   }

   ssl on;

   ssl_certificate /data/config/nginx/cert/demo.jeelowcode.com.pem;

   ssl_certificate_key /data/config/nginx/cert/demo.jeelowcode.com.key;

   ssl_session_timeout 5m;

   ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;

   ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

   ssl_prefer_server_ciphers on;

}

可以参考我们这个，这个是我们演示环境在用的

可以不加 ssl吗