This is usually due to the targeting set for the venue (e.g. Bronze, Silver, Gold).If this is the case, you will see an alert such as the below;
Or it could be if the campaign has a Max Booking setting and your venue has already been booked for.
Contact us via email at info@experiencethis.co or on the chat widget at the bottom of this screen if you feel the venue needs to be upgraded, or the Max Booking reviewed.