Article ID: 127656, created on Dec 1, 2015, last review on Dec 1, 2015

  • Applies to:
  • Plesk 12.5 for Windows
  • Plesk 11.5 for Windows


Website shows 500 Internal Server Error and following description:

   IIS Web Core
Error Code
Config Error
   There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined  
Config File


Configuration Errors Related to New ASP.NET 4 Root Configuration


Follow the arcticle to remove the configSections definition from the site's web.config.

Search Words

500 internal server error

duplicate section defined

web.config fails

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