I just tried to setup my new Studio 24c and ran into the same issue.
I have a new Macbook Pro with 4 usb-c ports. I had my external USB-C drives, my external monitor, and my new Studio 24c. The device wouldn't power up, I assumed it was because I had too many peripherals, so I unplugged the usb-c drives and finally got a light on the 48v phantom power button, but the USB light was red. I switched the cable to one I bought separately and viola, the USB light turned blue.
So, it appears that the USB-C cable provided by Presonus is faulty.
Anyone know what to do to get Presonus to provide replacements?