HTTP Error 500.21 - Internal Server Error: ExtensionlessUrlHandler-ISAPI-4.0_32 bit has a bad module

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HTTP Error 500.21 - Internal Server Error
Handler "ExtensionlessUrlHandler-ISAPI-4.0_32bit" has a bad module "IsapiModule" in its module list







Solution:

By changing following settings with IIS and .config file, you can fix this issue.

Step: 1. Reorder the handlers in your .config file and make ExtensionlessUrlHandler-ISAPI-4.0_64bit as default.



     
 
     
 
           
     
         
 
   
Step: 2. Set framework version to "ASP.Net v4.0" in application pool it has assigned.


I could resolved my issue with these two changes.

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