Could not pass event StructureGrowEvent to EpicWorldGenerator v7.2.5

[Former user]

EWG 7.2.5, spigot 1.9.4

Only one world is using EWG, others are using vanilla WG

[13:10:43 ERROR]: Could not pass event StructureGrowEvent to EpicWorldGenerator v7.2.5
org.bukkit.event.EventException
        at com.massivecraft.massivelag.inject.event.MassiveLagEventExecutor.execute(MassiveLagEventExecutor.java:77) ~[?:?]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.BlockSapling.b(BlockSapling.java:53) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.Block.a(Block.java:287) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.WorldServer.j(WorldServer.java:506) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.WorldServer.doTick(WorldServer.java:253) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:781) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]
Caused by: java.lang.NullPointerException
        at com.minelazz.epicworldgenerator.EpicWorldGenerator.a(Unknown Source) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor442.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_91]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_91]
        at com.massivecraft.massivelag.inject.event.MassiveLagEventExecutor.execute(MassiveLagEventExecutor.java:67) ~[?:?]
        ... 12 more