Initializing 18316 entity links
done.
Initializing 145 stability supports
done.
Initializing 13442 entity save caches
done.
Couldn't initialize Steam Server (InitGameServer returned false (2328166836,57141,28015,65535,3,"2215"))
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Server startup complete
EasyAntiCheat Scout Shutting Down
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
EasyAntiCheat Server Shutting Down
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
[Raknet] Server Shutting Down (Shutting Down)
Setting up 3 worker threads for Enlighten.
Thread -> id: 7f4e809f7700 -> priority: 1
Thread -> id: 7f4e55ffc700 -> priority: 1
Thread -> id: 7f4e70ffe700 -> priority: 1
eac_server.so [x64] :: OnUnload()

i have also refered to various forums (https://github.com/GameServerManagers/LinuxGSM/issues/1814) seeking for solution but no luck, it seems this bug comes now and then. Or i might be having some config issue, i cant figure out.
Server started with :

./RustDedicated" "-batchmode" "+server.ip" "XXX.197.1.180" "+server.port" "28015" "+server.tickrate" "10" "+server.hostname" "Server Name" "+server.identity" "server_identity" "+server.seed" "793197" "+server.maxplayers" "50" "+server.worldsize" "3000" "+server.saveinterval" "600" "+rcon.ip" "XXX.197.1.180" "+rcon.port" "28016" "+rcon.password" "******" "-logfile" "logfilename.log"​

Zer000

I assume the problem is related to the server IP/Port 

i use ufw, i have allowed ports 28015/6, i even tried with new ports 28017/8. but still same error.