There was a old post with the same error; but, there was no resolution, I've upgraded to the latest release and still getting the error. Entries in web.config.

Version=13.2.20132.2028

 <package id="AjaxControlToolkit" version="7.1213" targetFramework="net40" />
  <package id="AjaxMin" version="5.7.5124.21499" targetFramework="net40" />
  <package id="HtmlAgilityPack" version="1.4.6" targetFramework="net40" />
  <package id="jQuery" version="2.1.0" targetFramework="net40" />
  <package id="Microsoft.Data.Edm" version="5.6.0" targetFramework="net40" />
  <package id="Microsoft.Data.OData" version="5.6.0" targetFramework="net40" />
  <package id="Microsoft.Data.Services.Client" version="5.6.0" targetFramework="net40" />
  <package id="Microsoft.WindowsAzure.ConfigurationManager" version="2.0.3" targetFramework="net40" />
  <package id="Newtonsoft.Json" version="6.0.1" targetFramework="net40" />
  <package id="System.Spatial" version="5.6.0" targetFramework="net40" />
  <package id="WindowsAzure.Storage" version="3.0.3.0" targetFramework="net40" 

Getting the 'Infragisitcs' is undefined on line:
Sys.Application.add_init(function() {
    $create(Infragistics.Web.UI.WebDataGrid, {"id":"MainContent_WebDataGrid1","name":"WebDataGrid1","props":[[[,2,,],{"c":{"hdlay":false,"dcwidth":"","rac":"ig_RedPlanetAlt igg_RedPlanetAlt","ea":"false","_pi":"[\"../ig_res/Default/images/ig_ajaxIndicator.gif\",,,\"ig_AjaxIndicator\",,1,,,,\"ig_AjaxIndicatorBlock\",,3,,3,\"Async post\"]","ecr":false,"uid":"ctl00$MainContent$WebDataGrid1","shH":true,"en":"true","hmcf":false,"incolcnt":"0","ocs":1,"we":"false","cbdci":0,"pi":"[]","sv":"1","ti":0,"cbc":0}}],[[[[0]],,],[[[2]],,],[[["Selection",1,0,1,,,,],{"c":{"sc":"ig_RedPlanetSelected igg_RedPlanetSelectedCell","sr":"igg_RedPlanetSelectedRowSelector","si":"igg_RedPlanetSelectedRowSelectorImage","ehs":false,"sh":"igg_RedPlanetSelectedHeader"}}],,,["RowSelectionChanged::1"]],[[["RowSelectors"],{"c":{"rsc":"ig_RedPlanetHeader igg_RedPlanetRowSelector","rn":true}}],,,[]]],[{'0':[[1,"igede12b8d",0,,,""],{"c":{"css":"","headTxt":"ApplicationID","cf":"","type2":6,"htmlEnc":true,"type":"number","footTxt":"","fcs":1,"key":"ApplicationID","dfn":"ApplicationID","vIndex":0,"nullable":false}}],'1':[[0,,0,,,""],{"c":{"css":"","headTxt":"Select An Application:","cf":"","type2":0,"htmlEnc":true,"type":"string","footTxt":"","fcs":1,"key":"ApplicationName","dfn":"ApplicationName","vIndex":1,"nullable":false}}]},{}],[],]}, null, null, $get("MainContent_WebDataGrid1"));


In web.config:

<pages>
      <controls>
        <add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit"/>
        <add tagPrefix="ig" namespace="Infragistics.Web.UI.GridControls" assembly="Infragistics4.Web.v13.2, Version=13.2.20132.2028, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"/>
        <add tagPrefix="ig" namespace="Infragistics.Web.UI.LayoutControls" assembly="Infragistics4.Web.v13.2, Version=13.2.20132.2028, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"/>
        <add tagPrefix="ig" namespace="Infragistics.Web.UI.ListControls" assembly="Infragistics4.Web.v13.2, Version=13.2.20132.2028, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"/>
        <add tagPrefix="ig" namespace="Infragistics.Web.UI.EditorControls" assembly="Infragistics4.Web.v13.2, Version=13.2.20132.2028, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"/>
        <add tagPrefix="ig" namespace="Infragistics.Web.UI" assembly="Infragistics4.Web.v13.2, Version=13.2.20132.2028, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"/>
      </controls>
    </pages>