Had the same problem with ukrainian airports from marketplace and also had an opportunity to test non-marketplace UKLL, which worked fine. But I’ve found a solution - there is possibility to transfer these airports from marketplace to Contrail Shop account (including UKBB, which is delisted from sale there). At least 1 paid order at the Contrail Shop is required, I didn’t have one, so bought one of the cheapest airports (Tivat LYTV from the same developer) and successfully transfered all ukrainian airports there. Hope it helps to fly to/from Ukraine 
