I've created a new form in Contour (Version 1.1.13.2) and after the 8 question I got an error as below.

Someone any idea what's going wrong?

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: 

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

  <%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:







Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace: 


[NullReferenceException: Object reference not set to an instance of an object.]
   Umbraco.Forms.Core.Providers.Prevalues.Standard.GetPreValues(Field field) in c:\Program Files (x86)\teamcity\buildAgent\work\aea860ccc255f8c9\Umbraco.Forms.Core.Providers\Prevalues\Standard.cs:26
   Umbraco.Forms.UI.Usercontrols.EditForm.RenderFieldPreview(Field f) +484
   ASP.usercontrols_umbracocontour_editform_ascx.__DataBind__control18(Object sender, EventArgs e) +195
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +303
   System.Web.UI.Control.DataBindChildren() +11516967
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +321
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +185
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +627
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +167
   Umbraco.Forms.UI.Usercontrols.EditForm.RenderFieldset(Object sender, RepeaterItemEventArgs e) +584
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +204
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +627
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +167
   Umbraco.Forms.UI.Usercontrols.EditForm.RenderPage(Object sender, RepeaterItemEventArgs e) +584
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +204
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +627
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +167
   Umbraco.Forms.UI.Usercontrols.EditForm.Page_Load(Object sender, EventArgs e) +1770
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
   System.Web.UI.Control.LoadRecursive() +71
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3064

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1016

Part of the form:

Thnx!