Each line shows the Customer Name, their Customer Mobile Number and Email Address, the vehicle's Licence Plate Number and VIN, the Enroll Date it joined the scheme, and the Signature the customer gave when they enrolled. Total: above the table counts the vehicles listed.
What you see when nothing is enrolled. Until at least one vehicle has been signed up, the report shows Total: 0 and the message No Information Available under the column headings, and the Print button does not appear at all. That is the report working normally on a store that has not used the rewards scheme, not a fault. The Print button appears as soon as the report has at least one line.
The signature is the reason to keep this report to hand: it is the customer's own record of agreeing to join, held against the vehicle rather than the customer, so a customer with two enrolled cars appears twice, once for each.