[Insert screenshot of Fluenz registration form]

| Error Message | Likely Cause | Resolution | | :--- | :--- | :--- | | "Invalid Credentials" | User trying to use License Key as password. | Use the email address associated with the purchase. Reset password via browser. | | "Account Not Found" | Purchase made under different email (e.g., PayPal). | Check email receipts to identify the correct login email. Contact support to merge accounts. | | "Connection Error" | Firewall blocking Fluenz client. | Whitelist Fluenz domains in security settings or switch networks. |

[Insert screenshot of Fluenz login page]

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