Raidfarn does not work on my server

my friend and i have a server on apex hosting in 1.16.5 spigot, I have written with support where we have host but they could not help us and written we should write to you, I hope you can help me, we have smp where we build farms and we have build someone raid farm but there spawn no evoker and give almost nothing, i have tried to google but I can not find anything on there so I was wondering if you can help us with that