问题综合起来如下：1、论坛首页能打开，但是下面的其他页面打不开
2、用户登陆不了，一登陆就会出现下面的那串英文
3、系统的后台也登陆不了，一登陆也会出现下面的那串英文 Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, [no address given] and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
置顶卡
喧嚣卡
变色卡
千斤顶
显身卡