Fixed string getting cut off if the string had some symbols. The length of the string would not be the same as the bytes length.

Source/Game/Network/Packets/ReferAFriendPackets.cs

@@ -17,6 +17,7 @@
 
 using Framework.Constants;
 using Game.Entities;
+using System;
 
 namespace Game.Network.Packets
 {
@@ -65,7 +66,7 @@ namespace Game.Network.Packets
             _worldPacket .WriteInt32(Reason);
             // Client uses this string only if Reason == ERR_REFER_A_FRIEND_NOT_IN_GROUP || Reason == ERR_REFER_A_FRIEND_SUMMON_OFFLINE_S
             // but always reads it from packet
-            _worldPacket.WriteBits(Str.Length, 6);
+            _worldPacket.WriteBits(Str.GetByteCount(), 6);
             _worldPacket.WriteString(Str);
         }