Extracting value form Kendo Grid Value cannot be null.

Hello,

I have a problem with extracting a value form Kendo Grid.
The table is with three columns and I want to extract the text in second column of the first row. The second column cointains a full name of person.
Every time I run the test the full name in second column is different and I want to get this full name and use it for later.
I do the extraction with Quick Tasks.

Example:
Extract-kednoGrid:[2, 0] Cell text is "FirstName SecondName LastName"

and I change only the DataBindVirableName to FullNameTableCell (for example)

But when I run the test gives me the following error:

Value cannot be null.
Parameter name: key
InnerException:
System.ArgumentNullException: Value cannot be null.
Parameter name: key
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at ArtOfTest.Common.Design.Extensibility.ExtractionDataStore.AddToStore(VerificationDescriptor descriptor, DescriptorValueStore values)
   at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.ExecuteStep(Int32 order)