如果您想知道确切的错误描述，则需要在SharePoint Web应用程序web.config文件中进行以下更改.

If you would like to know what exact error description is, then you need to make following changes in your SharePoint web application web.config file.

1. CallStack="false"更改为CallStack="true"

<customErrors mode="On" />更改为<customErrors mode="Off" />

保存并从命令行执行IISRESET.

Save it and do IISRESET from command line.

再次打开页面，您将得到确切的错误.

Open Page again then you will get exact error.