IsaacDeadGod

If anyone can help me with this . I'm creating a command to open the GUI of a book. Supposedly this should work. But it doesn't do anything. Can somebody help me? Forge 1.16.5 - Server Side Mod dispatcher.register( Commands.literal("dummyCommand") .executes(context -> { ItemStack book = new ItemStack(Items.WRITTEN_BOOK); CompoundNBT nbt = new CompoundNBT(); ListNBT pages = new ListNBT(); pages.add(StringNBT.valueOf("{\"text\":\"Hello World\"}")); nbt.putString("author", "Steve"); nbt.putString("title", "my_book"); nbt.put("pages", pages); nbt.putByte("resolved", (byte) 1); book.setTag(nbt); context.getSource().getPlayerOrException().openItemGui(book, Hand.MAIN_HAND); return 1; }) ); I have tried with "SOpenBookWindowPacket" but it only sends the instruction to open a book that the user has in their hand. ServerPlayerEntity serverPlayerEntity = context.getSource().getPlayerOrException(); SOpenBookWindowPacket packet = new SOpenBookWindowPacket(serverPlayerEntity.getUsedItemHand()); serverPlayerEntity.connection.send(packet); The idea is that this mod is an information command for the user. You should not give a book to the user and have them read it. I have seen the Spigot documentation and have found some examples of how this is done on servers. PacketPlayOutCustomPayload packet = new PacketPlayOutCustomPayload("MC|BOpen", new PacketDataSerializer(buf)); Is there a way to do this with Forge Server Side? I've been dealing with this for 2 days and I can't find a solution. I've searched on Google and can't find anything.