java.lang.ClassCastException: net.minecraft.world.WorldServer cannot be cast to io.github.nucleuspowered.nucleus.mixins.interfaces.INucleusMixinWorld

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net.minecraft.world.WorldServer cannot be cast to io.github.nucleuspowered.nucleus.mixins.interfaces.INucleusMixinWorld
java.lang.ClassCastException: net.minecraft.world.WorldServer cannot be cast to io.github.nucleuspowered.nucleus.mixins.interfaces.INucleusMixinWorld	at io.github.nucleuspowered.nucleus.modules.world.commands.border.gen.EnhancedGeneration$NucleusChunkPreGenerator.accept(EnhancedGeneration.java:130)[EnhancedGeneration$NucleusChunkPreGenerator.class:0.12.0-5.0-SNAPSHOT]	at io.github.nucleuspowered.nucleus.modules.world.commands.border.gen.EnhancedGeneration$NucleusChunkPreGenerator.accept(EnhancedGeneration.java:53)[EnhancedGeneration$NucleusChunkPreGenerator.class:0.12.0-5.0-SNAPSHOT]	at org.spongepowered.common.scheduler.SchedulerBase.lambda$startTask$0(SchedulerBase.java:177)[SchedulerBase.class:1.10.2-2092-5.0.0-BETA-1753]	at org.spongepowered.common.scheduler.SyncScheduler.executeTaskRunnable(SyncScheduler.java:66)[SyncScheduler.class:1.10.2-2092-5.0.0-BETA-1753]	at org.spongepowered.common.scheduler.SchedulerBase.startTask(SchedulerBase.java:174)[SchedulerBase.class:1.10.2-2092-5.0.0-BETA-1753]	at org.spongepowered.common.scheduler.SchedulerBase.processTask(SchedulerBase.java:160)[SchedulerBase.class:1.10.2-2092-5.0.0-BETA-1753]	at java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4707)[?:1.8.0_101]	at org.spongepowered.common.scheduler.SchedulerBase.runTick(SchedulerBase.java:104)[SchedulerBase.class:1.10.2-2092-5.0.0-BETA-1753]	at org.spongepowered.common.scheduler.SyncScheduler.tick(SyncScheduler.java:41)[SyncScheduler.class:1.10.2-2092-5.0.0-BETA-1753]	at org.spongepowered.common.scheduler.SpongeScheduler.tickSyncScheduler(SpongeScheduler.java:191)[SpongeScheduler.class:1.10.2-2092-5.0.0-BETA-1753]	at org.spongepowered.mod.SpongeMod.onTick(SpongeMod.java:259)[SpongeMod.class:1.10.2-2092-5.0.0-BETA-1753]	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_10_SpongeMod_onTick_ServerTickEvent.invoke(.dynamic)[?:?]	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)[ASMEventHandler.class:?]	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:130)[EventBus.class:?]	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:99)[EventBus.class:?]	at net.minecraftforge.fml.common.FMLCommonHandler.onPreServerTick(FMLCommonHandler.java:274)[FMLCommonHandler.class:?]	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:602)[MinecraftServer.class:?]	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)[MinecraftServer.class:?]	at java.lang.Thread.run(Thread.java:745)[?:1.8.0_101]