Problem z iridiumskyblock

Witam mam takie cos w konsoli ( mam najnowsze pluginy i dalej nie moge naprawic tego)

[20:49:28] [Server thread/WARN]: [IridiumSkyblock] Task #244002 for IridiumSkyblock v3.1.2 generated an exception java.lang.NoClassDefFoundError: com/sk89q/worldedit/extent/clipboard/io/ClipboardFormats  at com.iridium.iridiumskyblock.schematics.WorldEdit.paste(WorldEdit.java:24) ~[?:?]  at com.iridium.iridiumskyblock.managers.SchematicManager.pasteSchematic(SchematicManager.java:48) ~[?:?]  at com.iridium.iridiumskyblock.managers.IslandManager.pasteSchematic(IslandManager.java:369) ~[?:?]  at com.iridium.iridiumskyblock.managers.IslandManager.lambda$null$6(IslandManager.java:256) ~[?:?]  at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:64) ~[patched_1.12.2.jar:git-Paper-1618]  at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:423) ~[patched_1.12.2.jar:git-Paper-1618]  at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:840) ~[patched_1.12.2.jar:git-Paper-1618]  at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1618]  at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1618]  at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1618]  at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]