---- Minecraft Crash Report ----

Time: ??/??/?? ??:??
Description: Exception in server tick loop

java.lang.NullPointerException: Boundary reference lost
    at net.minecraft.server.World.protect(World.java:???)
    at net.minecraft.server.World.tick(World.java:???)

Caused by: java.lang.EntityMismatchException

Expected: player
Found: copy (incomplete)

Additional Information:
    Entity Count: 3
    Registered Players: 2
    Unknown Instances: 1

    Unknown Instance Behavior:
        - mirrors players
        - delayed chat
        - learns formatting
        - cannot be removed

Fix Attempt:
    Injecting handler: "null"

Status:
    partial