Could not pass event ServerCommandEvent

[Invouker]

This error throwing me, I don't know why, because there is nothing what link with my code.

My version of server is:

This server is running Yatopia version git-Yatopia-ver/1.16.5-113 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)
Previous version: git-Yatopia-ver/1.16.5-108 (MC: 1.16.5)
You are 1 version(s) behind

Exception:

[15:33:28 ERROR]: Could not pass event ServerCommandEvent to WestLand v1.0
[15:33:28 ERROR]: Suspected Plugins:
[15:33:28 ERROR]: WestLand{enabled,ver=1.0,path=plugins/WestLand-1.0-SNAPSHOT.jar}
[15:33:28 ERROR]: Exception details below:
java.lang.NullPointerException: null
at java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011) ~[?:?]
at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006) ~[?:?]
at dev.alangomes.springspigot.context.Context.setSender(Context.java:57) ~[?:?]
at dev.alangomes.springspigot.context.Context.runWithSender(Context.java:99) ~[?:?]
at dev.alangomes.springspigot.context.Context.runWithSender(Context.java:139) ~[?:?]
at dev.alangomes.springspigot.event.SpringEventExecutor.lambda$create$1(SpringEventExecutor.java:25) ~[?:?]
at dev.alangomes.springspigot.event.SpringEventExecutor$$Lambda$6865/0000000000000000.execute(Unknown Source) ~[?:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:611) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.CommandDispatcher.dispatchServerCommand(CommandDispatcher.java:223) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.CommandBlockListenerAbstract.a(CommandBlockListenerAbstract.java:134) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.BlockCommand.a(BlockCommand.java:119) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.BlockCommand.tickAlways(BlockCommand.java:106) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.BlockBase$BlockData.a(BlockBase.java:677) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.WorldServer.b(WorldServer.java:1464) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.WorldServer$$Lambda$5416/0000000000000000.accept(Unknown Source) ~[?:?]
at com.destroystokyo.paper.server.ticklist.PaperTickList.tick(PaperTickList.java:309) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.TickListServer.b(TickListServer.java:59) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.WorldServer.doTick(WorldServer.java:1072) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1578) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:443) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1423) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1144) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-113]
at net.minecraft.server.v1_16_R3.MinecraftServer$$Lambda$3130/0000000000000000.run(Unknown Source) ~[?:?]
at java.lang.Thread.run(Thread.java:834) [?:?]