This error means that the terminal has been unlinked from your Paystack business and can't process payments. The wrong date and time on your terminal can also cause this error.
To troubleshoot this, kindly check the date and time on the device, then restart the device and try again.
If the issue persists, reach us at firstname.lastname@example.org with the device serial number and your business ID (the 6 digits at the top-left corner of your Paystack Dashboard). A member of our team will be in touch to help.