使用其他网站的特定位置时，从上游读取响应标头时，在stderr中发送FastCGI：“主脚本未知”

Question

我使用https://website1.inov.com

访问我的网站

如果我尝试访问应该是另一个应用程序的https://website1.inov.com/backend，我会得到

  

在读取时在stderr中发送的FastCGI：“主脚本未知”   来自上游的响应头

在我的虚拟主机下面：

server {
        server_name website1.inov.com www.website1.inov.com;
        root /var/www/website1/;
        index index.html;
        access_log /var/log/nginx/website1.inov.com.access.log combined if=$log_ua;
        error_log /var/log/nginx/website1.inov.com.error.log;

       # Return a 404 not found for every hidden files
        location ~ /\. {
                deny all;
                return 404;
        }

        location / {
                # Check if a file or directory index file exists, else route it to index.php.
                try_files $uri /index.html;
        }

        location /backend {
                 alias /var/www/backend;
                 index index.php;
                 try_files $uri $uri/ /backend/index.php;

                 location ~* ^/backend/(.*\.php)$ {
                 try_files  $uri $uri/ =404;
                 fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
                # fastcgi_split_path_info ^((?U).+\.php)(.*)$;
                 fastcgi_param PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin;
                 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                 fastcgi_index index.php;
                 fastcgi_param CI_ENV production;
                 fastcgi_param DOMAIN production;
                 include fastcgi.conf;
                }
        }

你能帮我吗？ 谢谢