Activation codes for streaming services like Disney+ often expire quickly for security reasons. These codes are designed to be time-sensitive to prevent unauthorized access and ensure a secure login process. If your activation code expires too soon, it could be due to delays in entering it, a session timeout, or an issue with your device. To resolve this, generate a new code by restarting the app or visiting disneyplus.com/begin and following the instructions. Always enter the code promptly to avoid expiration. If problems persist, check your internet connection or contact Disney+ support for assistance.