Commented Issue: Error with MaskedEditValidator [26984]

When i try to use the MaskedEditValidator I get a NullReferenceException

That is the Call stack location

AjaxControlToolkit.DLL!AjaxControlToolkit.MaskedEditValidator.OnPreRender(System.EventArgs e ) Line 360 + 0X29 bytes

and Source file information:

Locating source for 'C:\Users\Stephen\Documents\Repos\Superexpert\AjaxControlToolkit\Server\AjaxControlToolkit\MaskedEdit\MaskedEditValidator.cs'. Checksum: MD5 {ea 2f 74 58 2f 82 7f 77 98 d9 88 ba c4 e0 18 25}
The file 'C:\Users\Stephen\Documents\Repos\Superexpert\AjaxControlToolkit\Server\AjaxControlToolkit\MaskedEdit\MaskedEditValidator.cs' does not exist.
Looking in script documents for 'C:\Users\Stephen\Documents\Repos\Superexpert\AjaxControlToolkit\Server\AjaxControlToolkit\MaskedEdit\MaskedEditValidator.cs'...
Looking in the projects for 'C:\Users\Stephen\Documents\Repos\Superexpert\AjaxControlToolkit\Server\AjaxControlToolkit\MaskedEdit\MaskedEditValidator.cs'.
The file was not found in a project.
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\crt\src\'...
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\atlmfc\src\mfc\'...
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\atlmfc\src\atl\'...
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\atlmfc\include\'...
The debug source files settings for the active solution indicate that the debugger will not ask the user to find the file: C:\Users\Stephen\Documents\Repos\Superexpert\AjaxControlToolkit\Server\AjaxControlToolkit\MaskedEdit\MaskedEditValidator.cs.
The debugger could not locate the source file 'C:\Users\Stephen\Documents\Repos\Superexpert\AjaxControlToolkit\Server\AjaxControlToolkit\MaskedEdit\MaskedEditValidator.cs'.
Comments: I am getting that same error with the MaskedEditValidator. Is this a build error in the project? Full error message from webpage in my dev environment: Server Error in '/' Application. Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [NullReferenceException: Object reference not set to an instance of an object.] AjaxControlToolkit.MaskedEditValidator.OnPreRender(EventArgs e) in f:\TeamCity\buildAgent\work\80acd78aa4c25314\Server\AjaxControlToolkit\MaskedEdit\MaskedEditValidator.cs:360 System.Web.UI.Control.PreRenderRecursiveInternal() +83 System.Web.UI.Control.PreRenderRecursiveInternal() +155 System.Web.UI.Control.PreRenderRecursiveInternal() +155 System.Web.UI.Control.PreRenderRecursiveInternal() +155 System.Web.UI.Control.PreRenderRecursiveInternal() +155 System.Web.UI.Control.PreRenderRecursiveInternal() +155 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +974 Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34237