A. 1. Ensure you are using the correct email and password. If you’ve forgotten your password, use the 'Forgot Password' link to reset it. 2. Clear your browser cache and cookies, then try logging in again. 3. Disable any VPNs or proxies that may be affecting your connection to KDP.
B. 4. If you have two-step verification enabled, ensure you have access to the device or method you set up for receiving codes.