Fixes #8

gradle.properties

@@ -3,11 +3,11 @@ org.gradle.jvmargs=-Xmx1G
 
 # Fabric Properties
 minecraft_version=1.16.4
-yarn_mappings=1.16.4+build.1
-loader_version=0.10.6+build.214
+yarn_mappings=1.16.4+build.7
+loader_version=0.10.8
 
 #Fabric api
-fabric_version=0.25.1+build.416-1.16
+fabric_version=0.28.0+1.16
 
 # Mod Properties
 mod_version = 1.3.2

src/main/java/org/samo_lego/fabrictailor/mixin/EntityTrackerAccessor.java

@@ -1,11 +1,16 @@
 package org.samo_lego.fabrictailor.mixin;
 
 import net.minecraft.server.network.EntityTrackerEntry;
+import net.minecraft.server.network.ServerPlayerEntity;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.gen.Accessor;
 
+import java.util.Set;
+
 @Mixin(targets = "net.minecraft.server.world.ThreadedAnvilChunkStorage$EntityTracker")
 public interface EntityTrackerAccessor {
     @Accessor("entry")
     EntityTrackerEntry getEntry();
+    @Accessor("playersTracking")
+    Set<ServerPlayerEntity> getTrackingPlayers();
 }

src/main/java/org/samo_lego/fabrictailor/mixin/MixinServerPlayerEntity.java

@@ -3,7 +3,6 @@
 import com.mojang.authlib.GameProfile;
 import com.mojang.authlib.properties.Property;
 import com.mojang.authlib.properties.PropertyMap;
-import net.fabricmc.fabric.impl.networking.server.EntityTrackerStreamAccessor;
 import net.minecraft.entity.effect.StatusEffectInstance;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.network.packet.s2c.play.*;
@@ -58,7 +57,7 @@ public void reloadSkin() {
         ThreadedAnvilChunkStorage storage = ((ServerChunkManager)manager).threadedAnvilChunkStorage;
         EntityTrackerAccessor trackerEntry = ((ThreadedAnvilChunkStorageAccessor) storage).getEntityTrackers().get(player.getEntityId());
 
-        ((EntityTrackerStreamAccessor) trackerEntry).fabric_getTrackingPlayers().forEach(tracking -> trackerEntry.getEntry().startTracking(tracking));
+        trackerEntry.getTrackingPlayers().forEach(tracking -> trackerEntry.getEntry().startTracking(tracking));
 
         // need to change the player entity on the client
         ServerWorld targetWorld = (ServerWorld) player.world;