Mod Name

BaseSpawner.java and SpawnerBlockEntity.java.

Mod Homepage

https://www.curseforge.com/minecraft/modpacks/better-mc-forge-bmc4

Minecraft version

1.21.1

Describe the bug

After entering nether and discover a dungeon under fortress it happened frequently since then

Steps to reproduce

1. Enter Nether
2. Went into the dungeon
3. Not really consistent, around 1-10 minitus the server will crashed
4. First time when it happen is that one of my friend exprience lag and killed by a mob in the dungeon then the server crashed instantely
5. After i reboot the server, and let them rejoin, me and my friend try to login was fine, but my friend that die in the dungeon rejoined the server crashed again.

Logs

https://gist.github.com/NewUser198/29234e7dfc9782f771465d417326a834/revisions

Additional context

In the logs i try to analysis it myself
Found that:
The crash happens in BaseSpawner.java and involves SpawnerBlockEntity.java.
a) Cannot invoke "net.minecraft.world.entity.player.Player.m_21055_(net.minecraft.world.item.Item)"
because the return value of "net.minecraft.world.level.Level.m_45930_(
net.minecraft.world.entity.Entity, double)" is null

seems like is crashed because it the mod want to interact with a mob spawner in a way that requires a valid player entity, but the function is receiving a null value.

Not sure whether this is the root cause, and how to fix it.

Hi just for updates, based on checking by Luna Pixel Studios support
It is an issue of the mod spawner plus mod

1. Refresh and update the mod pack in curse forge PC client side
2. I redownload the updated version of the Better MC Server packet and replace the mods file with the latest version
   Issue resolved, thanks all

This is an issue with Spawners Plus (see NathanTheCraziest/spawners_plus#7)