Why your slots might not be showing

Three reasons, and the first is the one that makes a listing which "worked before" go quiet without you changing anything.

• They are in the past. Only future slots are offered. A batch published weeks ago quietly stops being bookable as it ages out — this is the usual answer when a listing that "worked before" now shows nothing.
• They are all booked. Success, but it looks identical to having none. Publish more.
• The listing is not active. An archived listing keeps its page and leaves the directory, slots and all.