Glowing for one person

I know there is a post about this but i cant seem to get it to work and it is abit different from what i want to do.

https://bukkit.org/threads/glowing-for-one-person.446790/ this is the post im talking about

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i think all of the other entities get the effect (including me) but nothing glows...

also i though that maybe the old post was a bit outdated so it wouldnt work.

Code:

package me.Heebo.MCCheats.commands;

import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.craftbukkit.v1_16_R3.entity.CraftPlayer;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;

import me.Heebo.MCCheats.Main;

import org.bukkit.*;

import net.minecraft.server.v1_16_R3.EntityHuman;
import net.minecraft.server.v1_16_R3.ForcedChunk;
import net.minecraft.server.v1_16_R3.MobEffect;
import net.minecraft.server.v1_16_R3.MobEffectList;
import net.minecraft.server.v1_16_R3.MobEffects;
import net.minecraft.server.v1_16_R3.PacketPlayOutEntityEffect;
import net.minecraft.server.v1_16_R3.PacketPlayOutNamedEntitySpawn;
import net.minecraft.server.v1_16_R3.BlockBase.e;

public class ESPCommand implements CommandExecutor {
   
    @SuppressWarnings("unused")
    private Main plugin;
   
    public ESPCommand(Main plugin) {
        this.plugin = plugin;
        plugin.getCommand("esp").setExecutor(this);
    }
   
    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (!(sender instanceof Player)) {
            sender.sendMessage("Only players can use this command");
            return true;
        }
       
       
        CraftPlayer p = (CraftPlayer) sender;
       
        if (p.hasPermission("esp.use")) {
           
            for (Entity e : p.getWorld().getEntities()) {
               
                PacketPlayOutEntityEffect effect = new PacketPlayOutEntityEffect(e.getEntityId(), new MobEffect(MobEffects.GLOWING, 1000, 20, true, true));   
                ((CraftPlayer) p.getPlayer()).getHandle().playerConnection.sendPacket(effect);
            }
           
           
            return true;
        } else {
            p.sendMessage("You do not have permission to use this command");
        }   
       
        return false;
    }
   
}

 

They used protocol lib and did a lot more than you. Try re-reading their thread it has your solution.