What could be the problem? Our controller is not connecting to the cortex. Our competition is today.
Try tethering the controller to the cortex with a USB-USB cable. Wait for it to connect that way. Once it connects, you can take out the cable and put the VEX net keys back in.
Make sure you turn on the cortex before the controllers.
you need to pair them, try this.
I though you were using V5.
I think this is their first year and they’re a middle school student so they probably heard cortex somewhere and just misused it here.
For future reference cortex is the old system.
If you are using VCS (which according to your other posts you are) then you are using the new system called the V5 robot brain.