代传递查询签证状态出现的errror是什么意思?

楼主和大家好,我有个问题请教,我是B2美国签证,符合免面签代传递,本月16号提交材料给中信银行,今天在使馆网上查询:
护照状态"是你的护照仍然於领事馆中",
签证状态显示的是 "Application Error An unexpected error has occurred while processing your previous request. The error has been reported to the site administrator; no further action is required".这是什么意思,为什么会出现错误?谢谢