(1.20.4 upgraded to 1.21)
When I go into the trial chamber and activate it the server crashes and the crash report is
---- Minecraft Crash Report ----
// Shall we play a game?
 
Time: 2024-06-14 22:01:59
Description: Ticking entity
 
java.lang.NullPointerException: Ticking entity
at java.base/java.util.Objects.requireNonNull(Objects.java:220)
at net.minecraft.world.entity.projectile.EntityArrow.c(EntityArrow.java:667)
at net.minecraft.world.entity.projectile.EntityArrow.<init>(EntityArrow.java:114)
at net.minecraft.world.entity.projectile.EntityArrow.<init>(EntityArrow.java:109)
at net.minecraft.world.entity.projectile.EntityTippedArrow.<init>(EntityTippedArrow.java:34)
at net.minecraft.world.item.ItemArrow.a(SourceFile:24)
at net.minecraft.world.entity.OminousItemSpawner.w(SourceFile:84)
at net.minecraft.world.entity.OminousItemSpawner.t(SourceFile:61)
at net.minecraft.world.entity.OminousItemSpawner.l(SourceFile:53)
at net.minecraft.server.level.WorldServer.a(WorldServer.java:889)
at net.minecraft.world.level.World.a(World.java:684)
at net.minecraft.server.level.WorldServer.lambda$tick$2(WorldServer.java:459)
at net.minecraft.world.level.entity.EntityTickList.a(SourceFile:54)
at net.minecraft.server.level.WorldServer.a(WorldServer.java:439)
at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:1472)
at net.minecraft.server.dedicated.DedicatedServer.c(DedicatedServer.java:406)
at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1321)
at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1071)
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318)
at java.base/java.lang.Thread.run(Thread.java:1570)
 
 
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
 
– Head –
Thread: Server thread
Stacktrace:
at java.base/java.util.Objects.requireNonNull(Objects.java:220)
at net.minecraft.world.entity.projectile.EntityArrow.c(EntityArrow.java:667)
at net.minecraft.world.entity.projectile.EntityArrow.<init>(EntityArrow.java:114)
at net.minecraft.world.entity.projectile.EntityArrow.<init>(EntityArrow.java:109)
at net.minecraft.world.entity.projectile.EntityTippedArrow.<init>(EntityTippedArrow.java:34)
at net.minecraft.world.item.ItemArrow.a(SourceFile:24)
at net.minecraft.world.entity.OminousItemSpawner.w(SourceFile:84)
at net.minecraft.world.entity.OminousItemSpawner.t(SourceFile:61)
at net.minecraft.world.entity.OminousItemSpawner.l(SourceFile:53)
at net.minecraft.server.level.WorldServer.a(WorldServer.java:889)
at net.minecraft.world.level.World.a(World.java:684)
at net.minecraft.server.level.WorldServer.lambda$tick$2(WorldServer.java:459)
at net.minecraft.world.level.entity.EntityTickList.a(SourceFile:54)
 
– Entity being ticked –
Details:
Entity Type: minecraft:ominous_item_spawner (net.minecraft.world.entity.OminousItemSpawner)
Entity ID: 3830
Entity Name: Ominous Item Spawner
Entity's Exact location: -171.50, -14.50, -878.50
Entity's Block location: World: (-172,-15,-879), Section: (at 4,1,1 in -11,-1,-55; chunk contains blocks -176,-64,-880 to -161,319,-865), Region: (-1,-2; contains chunks -32,-64 to -1,-33, blocks -512,-64,-1024 to -1,319,-513)
Entity's Momentum: 0.00, 0.00, 0.00
Entity's Passengers: []
Entity's Vehicle: null