Purchased through best buy

Purchased AVG ultimate through best buy. It will accept key code given through best buy digital library but after entering my name, email, and postal code it is telling me something went wrong. What is the fix for this.

Hello Scott,
Let's work together to fix it.
Are you trying to register the code using this link: https://www.avg.com/en-us/activation ?
If so, please try it in different browser and check the status. Share the screenshot of error message you received if you need further help.