Screenshot of avatars not displaying, on the active users page, http://zhidao.hmwis.com/user/activelist.html:

Solution:
lib/global.func.php
function get_avatar_dir
//return $setting[‘ucenter_url’] . ‘/avatar.php?uid=’ . $uid . ‘&size=middle’;
@include TIPASK_ROOT . ‘/data/ucconfig.inc.php’;
return UC_API . ‘/avatar.php?uid=’ . $uid . ‘&size=middle’;
The reason is that $setting[‘ucenter_url’] is empty!
After resolving this, the screenshot is as follows:

