Bukkit

Hi, this plugin es very good, i use the version 4.15, but At the time of purging, this message appears

[18:26:17] [Server thread/WARN]: [AutoSaveWorld] Task #45265 for AutoSaveWorld v4.15 generated an exception
java.lang.NullPointerException
at autosaveworld.features.purge.plugins.lwc.LWCRegenTask.performTask(LWCRegenTask.java:41) ~[?:?]
at autosaveworld.features.purge.taskqueue.TaskExecutor$2.run(TaskExecutor.java:58) ~[?:?]
at autosaveworld.utils.SchedulerUtils$1.run(SchedulerUtils.java:45) ~[?:?]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[Spigot_1_11_1.jar:git-Spigot-3fb9445-6e3cec8]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353) [Spigot_1_11_1.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:738) [Spigot_1_11_1.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [Spigot_1_11_1.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [Spigot_1_11_1.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [Spigot_1_11_1.jar:git-Spigot-3fb9445-6e3cec8]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]

I use the Unoficiall LWC: https://www.spigotmc.org/resources/lwc-unofficial-entity-locking.2162/