HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information:

Module   ProtocolSupportModule
Notification   SendResponse
Handler   PageHandlerFactory-Integrated
Error Code   0x800700b7
Config Error   Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'Access-Control-Allow-Origin'
Config File   \\?\C:\TPData\Domains\nbroadcasting.com\Web\customers\Services\web.config
Requested URL   http://www.textpower.com:80/apps/Apps/TPIAlertDispatcher.aspx
Physical Path   C:\TPData\Domains\nbroadcasting.com\Web\customers\Services\Apps\TPIAlertDispatcher.aspx
Logon Method   Not yet determined
Logon User   Not yet determined
Request Tracing Directory   C:\inetpub\logs\FailedReqLogFiles

Config Source:

  115:      <customHeaders>
  116:        <add name="Access-Control-Allow-Origin" value="*" />
  117:      </customHeaders>

More Information:

This error occurs when there is a problem reading the configuration file for the Web server or Web application. In some cases, the event logs may contain more information about what caused this error.

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