GrabCAD Print refuses to print PLA on F170

I've setup the F170 for PLA per the instructions with the PLA model extruder head on the left and the cooling module on the right. I've loaded and prepared my model in GrabCAD Print as it seems I'm supposed to. GrabCAD Print will not allow me to print!! Under 'Tray Settings', there is a yellow info box which tells me to 'load support material on your printer'. The Model Material is set to F123 PLA.

Any input would be greatly helpful!!