java.lang.NullPointerException: null
        at cx.sfy.LagAssist.stacker.StackChunk.getStack(StackChunk.java:159) ~[?:?]
        at cx.sfy.LagAssist.stacker.StackManager.isStacked(StackManager.java:56) ~[?:?]
        at cx.sfy.LagAssist.mobs.SmartMob.isRemovable(SmartMob.java:79) ~[?:?]
        at cx.sfy.LagAssist.mobs.SmartMob.MobCuller(SmartMob.java:67) ~[?:?]
        at cx.sfy.LagAssist.Monitor.LagMeasures(Monitor.java:72) ~[?:?]
        at cx.sfy.LagAssist.Monitor.access$0(Monitor.java:61) ~[?:?]
        at cx.sfy.LagAssist.Monitor$1$1.run(Monitor.java:162) ~[?:?]
        at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftTask.run(CraftTask.java:84) ~[patched_1.14.4.jar:git-Paper-226]
        at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:452) ~[patched_1.14.4.jar:git-Paper-226]
        at net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:1171) ~[patched_1.14.4.jar:git-Paper-226]
        at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:417) ~[patched_1.14.4.jar:git-Paper-226]
        at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:1098) ~[patched_1.14.4.jar:git-Paper-226]
        at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:925) ~[patched_1.14.4.jar:git-Paper-226]
        at java.lang.Thread.run(Thread.java:834) [?:?]