This is my stock standard approach to corsair link issues:
1: Completely uninstall Corsair Link
2: Unplug the USB and power headers from the motherboard
3: Plug the power header back in
4: Plug the USB header back in, using a different USB header this time
5: Re-download Corsair Link (this ensures you have the latest version)
6: Install Corsair Link
You may need to scroll through the list of fans and devices. For some reason my Corsair Link created duplicates of each component, but the duplicates had null values.
If that doesn't fix it let me know.