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General Error
SQL ERROR [ mysql4 ]

Table '.\forum\phpbb_login_attempts' is marked as crashed and should be repaired [145]

An SQL error occurred while fetching this page. Please contact the Board Administrator if this problem persists.

这样的错误信息太笼统。
你需要按照发帖的提示，来提供足够的信息。

还有你这里已经显示错误，你查看一下服务器日志记录的错误信息。