@Kyoko25
$0.00 is offcourse a technical error, which must be reported to Airbnb. I looked at your listing and simulated bookings, but they all give me normal prices. So maybe it is an incident, so you can message the guest about it, ask the guest to retract the booking request and make a new one.
Otherwise the guest can try to make an inquiry , so you can sent the guest the booking yourself by "special offer".
Contact Airbnb - Community Guide [Updated]