Discuz! System Error

Class "table_forum_post" does not have a method named "fetch_by_invisible_tid".

PHP Debug

No.FileLineCode
1forum.php66require(%s)
2source/module/forum/forum_viewthread.php871table_forum_post->fetch_by_invisible_tid(%s)
3source/module/forum/forum_viewthread.php871discuz_base->__call(%s, Array)
4source/class/discuz/discuz_base.php44break()
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