When you see this error message while you use rekordbox application, please follow the steps below.
1. Run rekordbox application
2. From top bar, KUVO --> Privacy Settings
3. Click "Change"
4. Enter your Pioneer DJ Account
Please enter your mail address and its password then click "Change".
When your account has been stored, you will see a message below.
Please see if you still see the error message?
If you still see the same error message, please file an inquiry ticket here.