Scheduled Refresh option has disappeared

I have this happen frequently on various long-standing reports as well. What has worked is to have another user do a "Take Over" of the dataset. In my cases, all reports have sourced data through a gateway, and the gateway link seems to be broken. The "set up" appears, but if you change one of the drop downs, the apply button will not activate. Once someone else takes the dataset over, I take it back over and the gateway can be reapplied and the Scheduled Refresh options reappear. The cause is just a theory, but the Take Over trick works.