Getting “The WebResource.axd handler must be registered in the configuration to process this request.” error

Question

I\'m getting this error while running my ASP.NET app on IIS7. I\'ve tried doing what it says to do but it doesn\'t help.

The WebResource.axd handler must

Answer 1

The issue happened to me on new Windows 2016 server where ASP.NET 4.6 was not installed. After installation everything got fixed.

Steps

- Run Server Manager
- Manage > Add Roles and Features 
- Server Roles
- Web Server (IIS) > Web Server > Application Development > ASP.NET 4.6