X3升级X3测试版，反馈bug

Discuz! System ErrorOops! System file lost: class/c2dw10/c2dw10_7k0e6.php
PHP Debug

No.	File	Line	Code
1	forum.php	71	require(%s)
2	source/module/forum/forum_viewthread.php	1000	include(%s)
3	data/template/1_diy_forum_viewthread.tpl.php	290	viewthread_profile_node(%s, Array)
4	source/module/forum/forum_viewthread.php	1416	call_user_func(%s, Array)
5			viewthread_profile_nodeparse(Array)
6	source/module/forum/forum_viewthread.php	1378	call_user_func(Array, Array, %s, %s, Array)
7			spl_autoload_call(%s)
8			core::autoload(%s)
9	source/class/class_core.php	153	core::import(%s)
10	source/class/class_core.php	119	break()

后台能进，前台能进，版块能进，进帖子时提示这个错误，帖子在版块列表里能预览，新窗口打开帖子就会提示这个错误