I had this same problem for 2 wks...I have an S6 on Verizon and disabling/uninstalling was not an option; the 'show notifications' box was shaded out so that was a no-go as well. No manipulation of location/notification/app mgr/Google account settings/force stops/factory resets would do the trick, Verizon techs couldn't fix it, and a Samsung tech couldn't fix it over the phone either--she told me that it was a software issue, and that it possibly needed to be re-flashed, so I ended up sending it back to Samsung since it's under warranty. The repair ticket said it 'WON'T DOWNLOAD SW/PRL' and 'S/W UPDATED. Know it's not what you wanted to hear, but maybe it will save you some frustration if you just send it back to the manufacturer.