Q:

Field "Tracking" from the Form template is throwing an exception

I am having some issues getting the WFFM (Web Forms for Marketers) 8.1 to work in a Sitecore 8.1 solution .... and I guess the reason is the below error that I get on the Tracking field from the Advanced section (Standard fields).
Does anyone have a clue why I get this error on the clean WFFFM installation? Thank you in advance. (log below)

Exception:

[ArgumentNullException: Value cannot be null.
  Parameter name: item]

 `Sitecore.Diagnostics.Assert.ArgumentNotNull(Object argument, String argumentName) +63
   Sitecore.Analytics.Data.Items.<GetDescendants>d__8.MoveNext() +98
   System.Linq.WhereSelectEnumerableIterator 2.MoveNext() +118
   System.Linq.<ConcatIterator>d__58 1.MoveNext() +178
   System.Linq.WhereEnumerableIterator 1.MoveNext() +108
   System.Linq.Enumerable.FirstOrDefault(IEnumerable 1 source) +147
        Sitecore.Shell.Applications.Analytics.TrackingField.TrackingFieldDetailsPage.RenderEvents(HtmlTextWriter output, XDocument doc, IEnumerable 1 pageEventDefinitions, Boolean isGoals, Boolean isFailures) +362
   Sitecore.Shell.Applications.Analytics.TrackingField.TrackingFieldDetailsPage.RenderTracking(HtmlTextWriter output, XDocument doc) +379
   Sitecore.Shell.Applications.Analytics.TrackingField.TrackingFieldDetailsPage.OnLoad(EventArgs e) +409
   System.Web.UI.Control.LoadRecursive() +68
   System.Web.UI.Control.LoadRecursive() +165
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4498`

Update: tried to install the newest version of WFFM 8.1 Update 2 but I see the same issue. Also tried to install the WFFM against new clean Core and Master databases and I get an error I was previously getting .. Post condition failed.

A:

This looks like there's an issue with your config.
One thing to check, make sure you have analyticsDefinitions="content" specified on the defintion of your shell site in your web.config
Failing this try to Deploy Marketing Definitions in Control Panel -> Analytics.

