Discuz! System Error 新浪微博插件 For Discuz! X2 2.1.5 升级安装出问题

Discuz! System Error
The property "discuz_application->db" is not defined

PHP Debug

No.	File	Line	Code
1	xwb/install/index.php	23	require_once(%s)
2	xwb/plugin.env.php	28	require_once(%s)
3	xwb/site.env.php	41	discuz_base->__get(%s)
4	source/class/discuz/discuz_base.php	39	break()

升级成这样了，怎么解决！？请教大侠们，

插件问题 请找插件的作者解决，这里是bug区哦！