Solution to the ambiguous "Configuration Error" - An error occurred loading a configuration file: Object reference not set to an instance of an object.

If you see this error message it means that you have not selected a .NET framework version to use for the website or virtual directory.

To resolve, go to IIS, properties of the site, ASP.NET tab and select the .NET framework version.

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Configuration Error
Description: **An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: An error occurred loading a configuration file: Object reference not set to an instance of an object.
Source Error:
[No relevant source lines]
Source File: C:\WINNT\Microsoft.NET\Framework\v2.0.50727\Config\machine.config Line: 0
**
Version Information:** Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.62
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