Didn't bulid lol. Fixed.

include/Engine/Network/Server.h

@@ -60,7 +60,7 @@ private:
     int  receive(char* data);
     void readFromClients();
     void send(Packet& packet, UserID user);
-    void send(Packet& packet, PlayerID player);
+    void send(PlayerID player, Packet& packet);
     void send(Packet& packet);
     void broadcast(Packet& packet);
     void sendSnapshot();

src/Engine/Network/Client.cpp

@@ -93,7 +93,7 @@ void Client::parseMessageType(Packet& packet)
         parseKick();
         break;
     case MessageType::OnPlayerSpawned:
-        parsePlayersSpawned();
+        parsePlayersSpawned(packet);
         break;
     default:
         break;

src/Engine/Network/Server.cpp

@@ -132,7 +132,7 @@ void Server::send(Packet& packet, UserID user)
     }
 }
 
-void Server::send(Packet& packet, PlayerID player)
+void Server::send(PlayerID player, Packet& packet)
 {
     int bytesSent = m_Socket.send_to(
         boost::asio::buffer(packet.Data(), packet.Size()),
@@ -442,6 +442,6 @@ bool Server::OnPlayerSpawned(const Events::PlayerSpawned & e)
     Packet packet = Packet(MessageType::OnPlayerSpawned);
     packet.WritePrimitive<EntityID>(e.Player.ID);
     packet.WritePrimitive<EntityID>(e.Spawner.ID);
-    send(packet, e.PlayerID);
+    send(e.PlayerID, packet);
     return false;
 }