RobotC won't download to brain

Crossposting for peer troubleshooting. This is our first year. I have attempted to download the RobotC firmware to the brain. I have already updated all components (brain, sensors, motors) to the latest VEXos 2.0.1. I am receiving the following message, and I can’t go any further. Using a school-issued Chromebook with RobotC 4.x loaded. I have tried checking and unchecking the boxes for “Allow any Ports” and “Ignore Ports that are Busy” in all combinations and using the USB cable that came with the superkit. The compiler target is set to physical robot and platform type set to VEXIQ (actually there were no other options).

I am unable to find what to do to work around this. Thanks for the help!