Not able to add a column with Datatype - "Datatable"

I am not able to add a column in a Datatable with Datatype as “DataTable”. are there any limitations recently added?

@niravshah89 You must use only types that are allowed in a Datatable. You can find more of the types suitable in this link :

Also What is the need of having the Column Type as Datatable :sweat_smile: