discuz的系统插件防水墙、QQ互联都用不了，也无法关闭

点击关闭就出错
Discuz! System ErrorIncorrect signature.
PHP Debug

No.	File	Line	Code
1	admin.php	57	require(%s)
2	source/admincp/admincp_plugins.php	223	include(%s)
3	source/plugin/qqconnect/switch.php	27	Cloud_Register->__construct(%s, %d, %s)
4	source/class/class_cloudregister.php	35	Cloud_Register->step_appCloseReasonsView()
5	source/class/class_cloudregister.php	114	Cloud_Service_Client_Cloud->appCloseReasonsView(%s, %s, %s)
6	source/plugin/manyou/Service/Client/Cloud.php	85	Cloud_Service_Client_Restful->_callMethod(%s, Array)
7	source/plugin/manyou/Service/Client/Restful.php	154	Cloud_Service_Client_Restful->_parseResponse(%s, false, false)
8	source/plugin/manyou/Service/Client/Restful.php	179	break()

+10086

升级到
dz 3.4

可登录数据库中删除