If you are having issues where your scanner is able to redeem but not check guests in or vice-versa and get the error below, it is because your scanner is picking up a barcode instead of a QR.
Sometimes the error will show a string before the word 'Punchh' which would also indicate an issue.
To resolve, you'll need to reach out to Auphan to troubleshoot.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)