HTTP Error 500.0 - Internal Server Error

Question

An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur.

Sachin Singh · Answer

Run this command first change directory to point to your IIS Express cd C:\Program Files\IIS Express Then appcmd set app /app.name:YOURAPPLICATION_NAME/ /applicationPool:Clr2IntegratedAppPool

Rajeesh Menoth · Answer

Hi, Please verify the following similar thread : https://stackoverflow.com/questions/19925448/im-getting-error-server-application-unavailable

Muhammad Imran Ansari · Answer

Check your application Pool (IIS -> Application Pools) if It is running in .net 4.0 then perform cleanup up activity in application level web.config that includes (system.web.extensions) all the section definitions that point to .net 3.5 because these section definitions are already included on root level (machine.config).

Gladis raja · Answer

still the error not resolved if you see the text "There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined", this error is because you are running a .NET Framework 3.5-based application in .NET Framework 4. If you are running WebMatrix, to resolve this problem, go to the Settings node to set the .NET Framework version to ".NET 2". You can also remove the extra sections from the web.config file. pls tell the steps how to do this

Muhammad Imran Ansari · Answer

This message indicates that an error has occurred during connection to the server and that the requested page cannot be accessed. However, it won’t tell you exactly why this is the case. Fortunately, there are different methods for finding the cause. Check below link to check multiple options to resolve this error. https://www.ionos.com/digitalguide/hosting/technical-matters/http-error-500-internal-server-error/