I need help in JavaScript of liquidbounce b100

[Goodsen1]

I really want to ask for help, and ask a master who knows Liquid Bounce Legacy B100 JavaScript to help me solve this problem.My JavaScript:
*

• var script = registerScript({

• name: "TestScript",
  

• version: "1.0",
  

• authors: ["test"]
  

• })
• var C03PacketPlayer = Java.type("net.minecraft.network.play.client.C03PacketPlayer")
• script.registerModule({

• name: "TestScript",
  

• description: "testscrpit",
  

• category: "Combat"
  

• }, function(module) {

• module.on("packet", function(e) {
  

•     try { 
  

•         if (e.getPacket() instanceof C03PacketPlayer) {
  

•             e.cancelEvent()
  

•         }
  

•     } catch (err) { 
  

•         Chat.print(err);
  

•     }
  

• })
  

• })
• Why can't liquidbounce b100 call packet event? It doesn't work and outputs many errors, such as TypeError: null has no such function "get packet". I'm sure there are many other errors, but I don't understand. How can I call packet event now?