Error: Referencia a objeto no establecida como instancia de un objeto.

In: en Bring2mind.DNN.Modules.DMX.Entities.Entries.EntriesController.GetCollectionContents(Int32 PortalId, Int32 CollectionId, Int32 UserId, Boolean UserIsAdmin, String Locale, Boolean IncludePermissions, Boolean IncludeAttributes, Boolean IncludeDeleted, Boolean IncludeHidden, String Sort, Int32& TotalCount, Int32 StartRecord, Int32 EndRecord) en Bring2mind.DNN.Modules.DMX.Views.TemplateView.vtContents_GetData(String DataSource, Dictionary`2 Parameters, List`1& Replacers, List`1& Arguments) en Bring2mind.DNN.Modules.DMX.Services.Templating.ViewTemplate.Template_GetData(String DataSource, Dictionary`2 Parameters, List`1& Replacers, List`1& Arguments) en Bring2mind.DNN.Modules.DMX.Services.Templating.Template.Template_GetData(String DataSource, Dictionary`2 Parameters, List`1& Replacers, List`1& Arguments) en Bring2mind.DNN.Modules.DMX.Services.Templating.Template.ReplaceSubtemplates(Match m) en System.Text.RegularExpressions.RegexReplacement.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat) en System.Text.RegularExpressions.Regex.Replace(String input, MatchEvaluator evaluator) en System.Text.RegularExpressions.Regex.Replace(String input, String pattern, MatchEvaluator evaluator) en Bring2mind.DNN.Modules.DMX.Services.Templating.Template.ReplaceContents()