I'm running a Thermos 1.7.10 server with Protocollib 3.7.0. Is anyone able to provide a small example on how to listen to packets from Forge mods being sent to/from the server?

I figured out how to listen to packets sent to the server by the client using PacketType.Play.Client.CUSTOM_PAYLOAD, but I can't seem to listen to packets sent from the server to the client using PacketType.Play.Server.CUSTOM_PAYLOAD.

Here is the code I'm using.