When you activate your application on the Intuit App Center and try to select a business profile, you see this error message:
Invalid Account ID (Error 13, Detail: Invalid account administrator. Account Administrator Does Not Use Intuit Accounts.)
This can happen if you try to activate your application directly in the Intuit App Center rather than using the link in your Welcome and Activation email.
Please begin the activation process by clicking the link provided in your Welcome and Activation email.