All was done connected to the same network.
All connected to the same network (and both WiFi and LAN for the S5), I did the following.
Within Cura, trying to preview a print brings up a black screen with the little page and X in the upper left corner (as though the file/stream fails to load).
Within Cura Connect, trying to preview a print brings up a black screen with the little page and X in the upper left corner (as though the file/stream fails to load).
Within the Ultimaker App on the iPhone, trying to preview a print brings up a black screen , though I do not believe I saw the X