A common cause of this error is not having a valid price for the room in Beds24 on the affected dates.
Any date without a price will be closed in Beds24 and we will send an inventory of zero to Expedia.
You *Make sure you have two options:valid rates for the mentioned dates and no bookings from other sources
*Beds24: change your inventory to send the allotment you have guaranteed Expedia
*Expedia: Ask Expedia to remove the guaranteed allotment