why the lunatic followers doesn't spawn(sky block world)

i killed golem plantara and skeletron this is the spawn area is somthing wrong with it?

https://preview.redd.it/azdxkqy2hulg1.png?width=873&format=png&auto=webp&s=221417587c29f70e72fd6bd17bc3399ce072ce5d

Processing img 591hrg5pgulg1...