Generating report on Owned by attribute of work item using jazz report builder

I want to generate report of work item using jazz reporting services where I want to display all the work items in which 'Owned by' field is set.
One answer

The "Select Users" just lists the users of the repository. It doesn't provide the function to filter the users by project area.
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I am also having same problem here that i am getting "Resource Full Name Missing" for the work item where owned by field is unassigned. I am aware that Select Users will list the users of the repository, my problem here is that i can not see users list. If I give value as * in the search bar, "no users found" message is displayed. Basically issue here is I am not able to see users list.

Could you find "owner_id" information from "RIODS.REQUEST" table? Could you find any record from "RIODS.RESOURCE" table?
If you can not, you may consider to run a DCC full load to re-collect the data. Otherwise, please check if the data source is correct.