上传多城市部署在【阿里云虚拟主机基础班】中报错

我看阿里云【阿里云虚拟主机-基础班】的域名绑定，最多能绑定1000个。 多城市上传上去【报：运行时错误】 “/”应用程序中的服务器错误。 运行时错误 说明: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated. 环境已设置.net FrameWork版本:V4.0/V4.5(经典)，请老大告知一下要设置下哪个代码才能完美适配。