Corrective Action for the "Failed to Verify the License. (1006)" Message After a KDS 2.0 Internet Update

1. Symptoms

KDS 2.0 / KDS 2.0 

• After the internet update is completed, clicking the Install button launches Smart Launcher and prompts for a license key.
• After the license key is entered, an error message appears during authentication.

• The product installation is complete, but the authentication process cannot proceed.

2. Root Cause

🟥 1) Incorrect tablet date/time settings (primary cause)

• The tablet's Date & Time setting is not configured to Automatic.
• License authentication uses server-time-based validation.
  • Authentication fails if the tablet time does not match the server time.

🟥 2) The license key itself is not the cause

• The license key entered by the customer is in the correct format.
• Authentication was successful with the same license key after the settings were corrected.

▶ Overall Assessment

• Invalid license key ❌
• KDS 2.0 app defect ❌
• Server issue ❌
• Tablet Environment Configuration Error ✔

3. Policy Decision

4. Final Resolution

✔ Enable automatic date and time settings on the tablet

• Settings path:

  Settings → General/General management → Date and time → Automatic date and time: On

✔ Restart the KDS 2.0 app and retry license authentication

✔ Confirm that license authentication is completed successfully

• The software upgrade can then proceed normally.