Reader failure can sometimes be seen as an error text in Connect on Zaptec GO chargers. However, no real impact is present because of this text, meaning it can be completely ignored.
Reader failure simply means that the unit was unable to read the RFID tag that was attempted for use. This could be because an RFID was not recognized by the system, or because the customer was holding up a keychain with multiple RFID tags when trying to start a charging session.
It has not functional impact on the charger, and is basically just a status text, that is not cleared. It can therefore just be ignored.