![An error occurred...500.19 - Internal Server Error ... 0x800700b7 ... There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined" when launching Controller (10.2.1 or earlier) caused by using .NET 4.0 An error occurred...500.19 - Internal Server Error ... 0x800700b7 ... There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined" when launching Controller (10.2.1 or earlier) caused by using .NET 4.0](https://www.ibm.com/support/pages/system/files/support/swg/cogtech.nsf/0/cb04a590891702a085257c5f003362a8/Symptom/3.486C.gif)
An error occurred...500.19 - Internal Server Error ... 0x800700b7 ... There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined" when launching Controller (10.2.1 or earlier) caused by using .NET 4.0
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How to Resolve HTTP Error 500.19 - Internal Server Error on Internet Information Services (IIS) - YouTube
![HTTP Error 500.19 - The requested page cannot be accessed because the related configuration data for the page is invalid | Appeon HTTP Error 500.19 - The requested page cannot be accessed because the related configuration data for the page is invalid | Appeon](https://www.appeon.com/sites/default/files/pictures/knowledgebase/20140909/1.png)
HTTP Error 500.19 - The requested page cannot be accessed because the related configuration data for the page is invalid | Appeon
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iis 7.5 - HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid - Stack Overflow
![Getting HTTP Error 500.19 - Internal Server Error when trying to access old ASP classic web site on Windows 2016 Server - Microsoft Q&A Getting HTTP Error 500.19 - Internal Server Error when trying to access old ASP classic web site on Windows 2016 Server - Microsoft Q&A](https://learn-attachment.microsoft.com/api/attachments/99208-http-error.jpg?platform=QnA)
Getting HTTP Error 500.19 - Internal Server Error when trying to access old ASP classic web site on Windows 2016 Server - Microsoft Q&A
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