插件Memcached缓存配置警告2条

直接复制wpjam插件目录下的object-cache.php文件到wp-content目录下，显示了Memcached选项，不过进入Memcached面板后，出现两条警告
Warning: Invalid argument supplied for foreach() in /www/wwwroot/cehua.xyz/wp-content/plugins/wpjam-basic/admin/pages/server-status.php on line 410

Warning: Invalid argument supplied for foreach() in /www/wwwroot/cehua.xyz/wp-content/plugins/wpjam-basic/admin/pages/server-status.php on line 290
有大佬知道怎么解决吗？