我有一台安装了 WordPress 的 Ubuntu 18.04 服务器。安装完成后，插件页面出现连接错误。起初只是一条错误消息plugin-install.php。重新启动后，又出现了 2 条错误消息，如下所示，我无法从我的服务器 ping 任何东西。（我 ping 的任何东西都丢失了 100% 的数据包。）我尝试编辑文件/ect/hosts，并尝试修改php.ini文件（找不到扩展名 = curl.so），但无济于事。
有任何想法吗？
Warning: An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.) in /var/www/html/wordpress/wp-includes/update.php on line 413
Warning: An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.) in /var/www/html/wordpress/wp-includes/update.php on line 693
Warning: An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.) in /var/www/html/wordpress/wp-admin/includes/plugin-install.php on line 183
附件是日志目录供参考：
故障日志只是其中的一系列^@代码。