WSO2 API Manager经Nginx反向代理后登录Carbon报403禁止错误

我已将WSO2 API Manager部署在配置了SSL的Nginx反向代理之后，尝试登录Carbon应用时，页面重定向后收到如下错误：

Error 403 - Forbidden

Nginx配置（nginx.conf） #

location /api/ {
     proxy_pass  https://csm-wso2-apim:9443/;
     proxy_http_version                 1.1;
     # don't cache it
     proxy_no_cache                     1;
     # even if cached, don't try to use it
     proxy_cache_bypass                 1;

     # Proxy headers
     proxy_set_header Upgrade           $http_upgrade;
     proxy_set_header Connection        "upgrade";
     proxy_set_header Host              $host;
     proxy_set_header X-Real-IP         $remote_addr;
     proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-Host  $host;
     proxy_set_header X-Forwarded-Port  $server_port;
     # Proxy headers

     # Proxy timeouts
     proxy_connect_timeout              3600s;
     proxy_send_timeout                 3600s;
     proxy_read_timeout                 3600s;
}

访问地址信息 #

• Carbon初始访问地址：https://dev-web-mtz.close-upinternational.com/api/carbon/admin/login.jsp
• 登录后重定向地址：https://dev-web-mtz.close-upinternational.com/api/carbon/admin/login_action.jsp

环境补充信息 #

• 浏览器连接状态：安全
• Java版本：11.0.14
• WSO2 API Manager版本：4.1.0

内容的提问来源于stack exchange，提问作者Aldo Inácio da Silva