Solution
Make sure in the previous step, you have selected
Automatically activate through a secure Internet connection. This will use the 9-digit code that was included in the Kit of Parts. If this still doesn't work, restart your computer and reopen LabVIEW.
The serial number given in your Kit of Parts should be valid starting from that year's FRC kick-off until the next year's kick-off. If you find that your serial number is not able to activate your software, make sure that you are not using a previous competition year's serial number.
If you are still having issues, or if you are getting an Activation Warning, see the following article:
Activation Warning in NI License Manager for FRC Software.