用nginx反代后，添加http auth显示Server Error

[franocisgar]

Internal Server Error
nginx.conf如下

    server {
        listen       443 ssl http2;
        server_name  localhost;

        ssl_certificate      CDNcert.pem;
        ssl_certificate_key  CDNkey.key;

        location / {
            proxy_pass http://127.0.0.1:56559;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'Upgrade';
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-Host $host:$server_port;
            proxy_set_header X-Forwarded-Server $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            auth_basic "realm";
            auth_basic_user_file /etc/nginx/auth.txt;
        }
    }

相反，不添加http auth时就可以直接反代，如何解决？想私人或小部分范围访问。

[ultraplusgithub]

hello, how do you solve it ?