If you are running HighGear X6.2.0 or later and the server operating system is Windows Server 2008, you may receive this ASP.NET error:

The configuration section ‘system.web.extensions’ cannot be read because it is missing a section declaration.

The configuration section 'system.web.extensions' cannot be read because it is missing a section declaration

This is a known Microsoft issue in .NET 4.0 when running on IIS 7.0. .NET 4.0 is required to run HighGear X6.2.0 and later.

To fix the issue, install KB958854 on the server.

Warning: You must restart the server after you apply this hotfix.