fecmall程序安装完后，登录应用市场安装插件，登录失败。
Http status: 500 Internal Server Error
ajaxOptions: error
thrownError: Internal Server Error
PHP Warning 'yii\base\ErrorException' with message 'Illegal string offset 'code''
in /www/wwwroot/fecmall/vendor/fancyecommerce/fecshop/services/extension/RemoteService.php:39
通过查看源代码，找到登录接口，在服务器ping不同
ping -c 10 120.24.37.249
PING 120.24.37.249 (120.24.37.249) 56(84) bytes of data.
--- 120.24.37.249 ping statistics ---
10 packets transmitted, 0 received, 100% packet loss, time 8999ms