HTTP Error 500.0 - Internal Server Error using vis

I am using visual studio 2013. I am trying to run a web app on my browser and I get the following error.

I have searched this forum but is not working. I was running the same web app yesterday and it worked fine.Today it does not.

Thank you for your help

回答1:

I too faced this problem when my Windows was upgraded. Doing this fixed the issue on my computer. Also note that you have to select the Server node on the left side panel. (NOT a web site). Follow the instructions in the screenshots and then Uncheck the www server checkbox. Restart the IIS and it worked on my machine!

回答2:

I was also facing similar issue from last 2-3 days. I am using VS2013 professional for building MVC application. All of sudden, any web application created on VS2013 started giving this kind of error. I tried reinstalling IIS, VS2013; but it does not worked for me.

During event logs checks, I found this error message-

"FailedRequestTracing module detected invalid configuration on path 'MACHINE/WEBROOT/APPHOST'. Trace provider or tracing area name 'WWW Server' is not recognized. Check the section for currently supported list or providers and areas. No logs will be generated until this condition is corrected. The problem happened at least 1 times in the last 5 minutes. The data is the error."

In applicationhost.config file, I did found below tag-

<add provider="WWW Server" areas="Authentication,Security,Filter,StaticFile,CGI,Compression,Cache,RequestNotifications,Module,FastCGI,WebSocket,Rewrite,RequestRouting,iisnode" verbosity="Verbose" />

I removed this tag from applicationhost.config file located under C:\Users\\My Documents\IISExpress\config path on windows 7 machine.

Now my all application started running fine from VS2013 with IISexpress.

See if this helps.

Cheers

Sanket