SATO CT4-LX - Error Message 1046 (EAP Authentication Error (EAP Failure))

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Error Message 1046 (EAP Authentication Error (EAP Failure))
When there is an error with the product, the error message appears on the screen.
Tap the error number button to show the details screen.
Check the cause and countermeasure, and then take appropriate action.
To clear the error:
Tap [SETTINGS] to change the Wi-Fi settings or tap [CLEAR].
Cause and Countermeasure Reference
Cause
EAP Authentication failure.
Countermeasure
Use the correct Wi-Fi settings.
EAP Conf.
Contact your SATO technical support if the error cannot be resolved.
Contact Information for When You Are in Trouble