My mod is not loading on a dedicated server that I'm using for beta testing features the crash report is below.

Crash Report

I followed a tutorial to create the classes to run the networking.

My current code is below. One thing to note is that the mod runs on client side without an issue.

package org.multicoder.mcpaintball.network;

import net.minecraft.resources.ResourceLocation;
import net.minecraft.server.level.ServerPlayer;
import net.minecraftforge.network.NetworkDirection;
import net.minecraftforge.network.NetworkRegistry;
import net.minecraftforge.network.PacketDistributor;
import net.minecraftforge.network.simple.SimpleChannel;
import org.multicoder.mcpaintball.MCPaintball;
import org.multicoder.mcpaintball.network.packets.*;

public class Networking
{
    private static SimpleChannel INSTANCE;
    private static int id = 0;
    private static int ID(){
        return id++;
    }

    public static void Register()
    {
        SimpleChannel net = NetworkRegistry.ChannelBuilder.named(new ResourceLocation(MCPaintball.MODID,"messsage")).networkProtocolVersion(() -> "1.0.0").clientAcceptedVersions(s -> true)
                .serverAcceptedVersions(s -> true).simpleChannel();

        INSTANCE = net;

        net.messageBuilder(TeamPointS2CPacket.class,ID(),NetworkDirection.PLAY_TO_CLIENT).decoder(TeamPointS2CPacket::new).encoder(TeamPointS2CPacket::toBytes).consumerMainThread(TeamPointS2CPacket::Handle).add();
        net.messageBuilder(TeamUpdateS2CPacket.class,ID(),NetworkDirection.PLAY_TO_CLIENT).decoder(TeamUpdateS2CPacket::new).encoder(TeamUpdateS2CPacket::toBytes).consumerMainThread(TeamUpdateS2CPacket::Handle).add();
        net.messageBuilder(PlayLowClassSoundS2CPacket.class,ID(),NetworkDirection.PLAY_TO_CLIENT).decoder(PlayLowClassSoundS2CPacket::new).encoder(PlayLowClassSoundS2CPacket::toBytes).consumerMainThread(PlayLowClassSoundS2CPacket::Handle).add();
        net.messageBuilder(PlayHighClassSoundS2CPacket.class,ID(),NetworkDirection.PLAY_TO_CLIENT).decoder(PlayHighClassSoundS2CPacket::new).encoder(PlayHighClassSoundS2CPacket::toBytes).consumerMainThread(PlayHighClassSoundS2CPacket::Handle).add();
        net.messageBuilder(TeamUpdateC2SPacket.class,ID(),NetworkDirection.PLAY_TO_SERVER).decoder(TeamUpdateC2SPacket::new).encoder(TeamUpdateC2SPacket::toBytes).consumerMainThread(TeamUpdateC2SPacket::Handle).add();
    }

    public static <MSG> void SendToServer(MSG message)
    {
        INSTANCE.sendToServer(message);
    }

    public static <MSG> void sendToPlayer(MSG message, ServerPlayer player) {INSTANCE.send(PacketDistributor.PLAYER.with(() -> player), message);}

    public static <MSG> void sendToClients(MSG message) {INSTANCE.send(PacketDistributor.ALL.noArg(), message);}
}

@Mod(MCPaintball.MODID)
public class MCPaintball
{
    public static final String MODID = "mcpaintball";
    public static final Logger LOG = LogManager.getLogger(MODID);
    public MCPaintball()
    {
        ModLoadingContext.get().registerConfig(ModConfig.Type.COMMON, MCPaintballConfig.SPEC,"mcpaintball-common.toml");
        IEventBus bus = FMLJavaModLoadingContext.get().getModEventBus();
        bus.register(this);
        bus.addListener(this::OnCommon);
    }


    private void OnCommon(FMLCommonSetupEvent event)
    {
        event.enqueueWork(() -> {
            BlockHolder.AppendList();
        });
        Networking.Register();

    }

    // Removed Unnessacery things from file to shrink its size
}

 

I have found my issue, I had forgotten to put the register inside the enqueueWork Runnable