NullPointerException because "this.wrapped" is null (Fabric 1.21.1)

[suerion]

Describe the bug
Allways get on Server an NPE

java.lang.NullPointerException: Cannot invoke "it.unimi.dsi.fastutil.objects.ReferenceArrayList.get(int)" because "this.wrapped" is null

[22:02:04] [Server thread/INFO]: [STDERR]: java.lang.NullPointerException: Cannot invoke "it.unimi.dsi.fastutil.objects.ReferenceArrayList.get(int)" because "this.wrapped" is null
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//it.unimi.dsi.fastutil.objects.Reference2LongOpenHashMap$MapIterator.nextEntry(Reference2LongOpenHashMap.java:711)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//it.unimi.dsi.fastutil.objects.Reference2LongOpenHashMap$EntryIterator.next(Reference2LongOpenHashMap.java:803)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//it.unimi.dsi.fastutil.objects.Reference2LongOpenHashMap$EntryIterator.next(Reference2LongOpenHashMap.java:798)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//com.ishland.vmp.common.playerwatching.NearbyEntityTracking.tick(NearbyEntityTracking.java:155)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.class_3898.method_18727(class_3898.java:11347)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.class_3215.method_12127(class_3215.java:311)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.class_3218.method_18765(class_3218.java:350)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:1021)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.class_3176.method_3813(class_3176.java:299)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:912)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:697)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at knot//net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:281)
[22:02:04] [Server thread/INFO]: [STDERR]: 	at java.base/java.lang.Thread.run(Thread.java:1583)

To Reproduce
Steps to reproduce the behavior:

1. Add VMP on Server
2. Get error on Console

Runtime info (please complete the following information):

• OS: Ubuntu 24
• Minecraft version: 1.21.1
• Mod version: 0.2.0+beta.7.170 devbuild for 1.21.1

Crash reports / logs
https://mclo.gs/Pmna2fi

Checklist

• I am using the official version of the mod.
• I tried the latest development version but the issue persists.
• I searched for similar open issues and could not find an existing bug report on this.

Additional context

[ishland]

Some mods is doing weird stuff corrupting the server internals (probably icl). Try removing icl and see if the problem goes away.

[hiimrickross]

Some mods is doing weird stuff corrupting the server internals (probably icl). Try removing icl and see if the problem goes away.

Sorry to bother you but I was just looking at some more optimization mods to see if anything might be useful for my 3 man server, and I happened to see this thread. I've had the exact same server crash before - it happens randomly, sometimes early into a session, sometimes 2-4 days later, sometimes it actually happens and doesn't crash the server (once). I also have ICL; and one time it crashed as the cleanup happened (one out of like hundreds of cleanups) - can you shed a little bit of light into maybe why it's ICL? In the meantime I will try remove it from my server. But it's nice to prevent entity drop lag.