Website shows 500 Internal Server Error: There is a duplicate section defined

Created:

2016-11-16 12:57:04 UTC

Modified:

2017-04-24 11:12:52 UTC

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Website shows 500 Internal Server Error: There is a duplicate section defined

Applicable to:

  • Plesk 11.5 for Windows
  • Plesk 12.0 for Windows
  • Plesk 12.5 for Windows

Symptoms

Website shows 500 Internal Server Error and the following description:

Module
IIS Web Core
Error Code
0x800700b7
Config Error
There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined
Config File
\\\\?\\G:\\Inetpub\\vhosts\\example.com\\httpdocs\\web.config

Cause

Errors related to the configuration rules of ASP.NET 4.x.

Resolution

Follow the article http://www.asp.net/whitepapers/aspnet4/breaking-changes#0.1__Toc256770149 to remove the duplicate definitions from %plesk_vhosts%/example.com/httpdocs/web.config .

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