求助！关于 OCSP 装订的问题。

NGINX 报错：

"ssl_stapling" ignored, host not found in OCSP responder "ocsp.int-x3.letsencrypt.org" in the certificate "/usr/local/nginx/ssl/www.pem"

ssllabs 检测提示：

This server certificate supports OCSP must staple but OCSP response is not stapled

NGINX 配置如下：

        ssl_certificate      /usr/local/nginx/ssl/www.pem;
        ssl_certificate_key  /usr/local/nginx/ssl/www.key;
        ssl_session_cache    shared:SSL:5m;
        ssl_session_timeout  5m;
        ssl_early_data       on;
        ssl_protocols        TLSv1.2 TLSv1.3;
        ssl_prefer_server_ciphers  on;
        ssl_stapling         on;
        resolver      223.5.5.5;
        ssl_stapling_verify  on;

请问是哪里的问题？