"User Authentication Failed" When Accessing KDS Diagnostic Functions

○ Symptom: When accessing the KDS diagnostic functions, a user authentication failure occurs

○ Solution 1. Log in again

1. Log out of KDS.

2. Close all apps currently running on the tablet, including KDS.

3. Launch KDS, log in, and try again.

If the issue is not resolved by following the steps above, proceed with Solution 2.

○ Solution 2. Clear the KDS app data and cache

1. Log out of KDS.

2. Close all apps currently running on the tablet, including KDS.

3. On the tablet, navigate to the following path.

   Path: Settings -> Applications -> KDS2.0/KDS -> Storage

4. Select Clear data or Clear cache to proceed.

    (All inspection data stored on the tablet will be deleted.)

5. Launch KDS, log in, and try again.