java.lang.NullPointerException: Exception ticking world
    at java.base/java.util.Objects.requireNonNull(Objects.java:233)
    at org.dreeam.leaf.util.map.AttributeInstanceSet.toArray(AttributeInstanceSet.java:67)
    at org.dreeam.leaf.util.map.AttributeInstanceSet.toArray(AttributeInstanceSet.java:76)
    at net.minecraft.world.entity.ai.attributes.AttributeMap.getAttributesToSync(AttributeMap.java:56)
    at net.minecraft.server.level.ServerEntity.sendDirtyEntityData(ServerEntity.java:430)
    at net.minecraft.server.level.ServerEntity.sendChanges(ServerEntity.java:235)
    at net.minecraft.server.level.ChunkMap.newTrackerTick(ChunkMap.java:1072)
    at net.minecraft.server.level.ChunkMap.tick(ChunkMap.java:1088)
    at net.minecraft.server.level.ServerChunkCache.tick(ServerChunkCache.java:514)
    at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:978)
    at net.minecraft.server.MinecraftServer.tickLevel(MinecraftServer.java:1866)
    at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1969)
    at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1718)
    at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:492)
    at net.minecraft.server.MinecraftServer.processPacketsAndTick(MinecraftServer.java:1775)
    at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1439)
    at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:430)
    at java.base/java.lang.Thread.run(Thread.java:1583)