java.lang.NullPointerException: Cannot invoke "net.minecraft.network.chat.PlayerChatMessage.f()" because "var0" is null
        at net.minecraft.network.chat.OutgoingPlayerChatMessage.a(SourceFile:23) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-
Spigot-2183145-6da8266]
        at net.minecraft.server.network.PlayerConnection.chat(PlayerConnection.java:2038) ~[spigot-1.19.1-R0.1-SNAPSHOT.
jar:3554-Spigot-2183145-6da8266]
        at org.bukkit.craftbukkit.v1_19_R1.entity.CraftPlayer.chat(CraftPlayer.java:387) ~[spigot-1.19.1-R0.1-SNAPSHOT.j
ar:3554-Spigot-2183145-6da8266]
        at io.github.mrcomputer1.chattest.ChatTest.onCommand(ChatTest.java:20) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[spigot-api-1.19.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[spigot-api-1.19.1-R0.1-SNAPSHOT.jar
:?]
        at org.bukkit.craftbukkit.v1_19_R1.CraftServer.dispatchCommand(CraftServer.java:831) ~[spigot-1.19.1-R0.1-SNAPSH
OT.jar:3554-Spigot-2183145-6da8266]
        at org.bukkit.craftbukkit.v1_19_R1.command.BukkitCommandWrapper.run(BukkitCommandWrapper.java:44) ~[spigot-1.19.
1-R0.1-SNAPSHOT.jar:3554-Spigot-2183145-6da8266]
        at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:264) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:
?]
        at net.minecraft.commands.CommandDispatcher.performCommand(CommandDispatcher.java:298) ~[spigot-1.19.1-R0.1-SNAP
SHOT.jar:3554-Spigot-2183145-6da8266]
        at net.minecraft.commands.CommandDispatcher.a(CommandDispatcher.java:282) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554
-Spigot-2183145-6da8266]
        at net.minecraft.server.network.PlayerConnection.b(PlayerConnection.java:1940) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar
:3554-Spigot-2183145-6da8266]
        at net.minecraft.server.network.PlayerConnection.lambda$18(PlayerConnection.java:1905) ~[spigot-1.19.1-R0.1-SNAP
SHOT.jar:3554-Spigot-2183145-6da8266]
        at net.minecraft.util.thread.IAsyncTaskHandler.b(SourceFile:68) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spigot-21
83145-6da8266]
        at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768) ~[?:?]
        at net.minecraft.server.TickTask.run(SourceFile:18) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spigot-2183145-6da826
6]
        at net.minecraft.util.thread.IAsyncTaskHandler.d(SourceFile:157) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spigot-2
183145-6da8266]
        at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.d(SourceFile:23) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-
Spigot-2183145-6da8266]
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1150) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spig
ot-2183145-6da8266]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:1) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spigot-
2183145-6da8266]
        at net.minecraft.util.thread.IAsyncTaskHandler.x(SourceFile:131) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spigot-2
183145-6da8266]
        at net.minecraft.server.MinecraftServer.bh(MinecraftServer.java:1129) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spi
got-2183145-6da8266]
        at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1122) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spig
ot-2183145-6da8266]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:140) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spigot-2
183145-6da8266]
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1106) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spig
ot-2183145-6da8266]
        at net.minecraft.server.MinecraftServer.v(MinecraftServer.java:1017) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:3554-Spig
ot-2183145-6da8266]
        at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:293) ~[spigot-1.19.1-R0.1-SNAPSHOT.jar:355
4-Spigot-2183145-6da8266]
        at java.lang.Thread.run(Thread.java:833) [?:?]