getting Error while opening my web application ?

I think the best first approach is to make sure to turn on detailed error messages via your web.config file, like this:

After doing this, you should get a more detailed error message from the server.

In my particular case, the more detailed error pointed out that my section of the web.config file was not allowed at the folder level where I'd placed my web.config. It said "This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false". "

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Rajkiran Swain8y ago
Accepted answer
I think the best first approach is to make sure to turn on detailed error messages via your web.config file, like this:

After doing this, you should get a more detailed error message from the server.
In my particular case, the more detailed error pointed out that my section of the web.config file was not allowed at the folder level where I'd placed my web.config. It said "This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false". "

getting Error while opening my web application ?

HTTP Error 500.0 - Internal Server Error

The page cannot be displayed because an internal server error has occurred.

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