From Nikon:
IMPORTANT: Firmware updates cannot be performed if Enable is currently selected for Network > Network connection in the SETUP MENU. Select Disable for Network connection before proceeding.
Changes from “C” Firmware Version 1.30 to 1.31
Fixed an issue that occurred with WR-R10 wireless remote controller firmware version 3.00. In rare cases, the camera would fail to display the number of exposures remaining or would take about a minute to power down when the WR-R10 was connected.
Download: Nikon D4s Firmware v.1.31