I've tried to properly sending message from client to server for quite long time without success. I did read document on Raknet, and saw a few sample code here of JRakNet in issues section as I cannot ...

You have a perpetual fallback license for this version. Subscription expired on August 2, 2025. Runtime version: 17.0.7+10-b829.16 amd64 VM: OpenJDK 64-Bit Server VM ...