上传wordpress后打不开安装界面

我买的是云虚拟主机，我将之前的网站给删除了，准备用WordPress重新做一个网站，域名和空间都没变，但是上传安装包后，打开域名不显示安装界面，只显示错误显示。


Internal Server Error


The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@hyu2459470001.my3w.com 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.


请问是怎么回事啊？