Tin Minecraft Lỗi này là sao vậy mn

at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:70) ~[patched_1.12.2.jar:git-Paper-1620]
... 11 more
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[00:57:44 ERROR]: Encountered an unexpected exception
net.minecraft.server.v1_12_R1.ReportedException: Exception ticking world entities
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:932) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1620]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at io.lumine.xikage.mythicmobs.mobs.MobManager.setEntityDespawned(MobManager.java:361) ~[?:?]
at io.lumine.xikage.mythicmobs.volatilecode.v1_12_R1.VolatileWorldHandler_v1_12_R1$1.b(VolatileWorldHandler_v1_12_R1.java:69) ~[?:?]
at net.minecraft.server.v1_12_R1.World.c(World.java:1229) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.WorldServer.c(WorldServer.java:1244) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.World.tickEntities(World.java:1535) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.WorldServer.tickEntities(WorldServer.java:682) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:921) ~[patched_1.12.2.jar:git-Paper-1620]
... 4 more
>
[00:57:44 ERROR]: Cause of unexpected exception was
java.lang.NullPointerException: null
at io.lumine.xikage.mythicmobs.mobs.MobManager.setEntityDespawned(MobManager.java:361) ~[?:?]
at io.lumine.xikage.mythicmobs.volatilecode.v1_12_R1.VolatileWorldHandler_v1_12_R1$1.b(VolatileWorldHandler_v1_12_R1.java:69) ~[?:?]
at net.minecraft.server.v1_12_R1.World.c(World.java:1229) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.WorldServer.c(WorldServer.java:1244) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.World.tickEntities(World.java:1535) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.WorldServer.tickEntities(WorldServer.java:682) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:921) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1620]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1620]
at java.lang.Thread.run(Thread.java:829) [?:?]
>
[00:57:44 ERROR]: This crash report has been saved to: /home/container/./crash-reports/crash-2023-07-19_00.57.44-server.txt
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