Asp.net web site administration tool cannot run properly

I originally wanted to use the user security and management modules provided by Asp.net, but now I cannot use the Asp.net web site administration tool in any way in the development environment, "An error was encountered. please return to the previous page and try again. ", click another tab, and the prompt" tool has timed out. as a security measure, the Web site administration tool times out after a period of inactivity. changes to machine. config or web. config may also result in the tool needing to be restarted. to contin UE refreshing ing your web site, restart the tool .". I tried various methods but still failed. I don't know which friend has used them. Please give me some advice.