Question Unity Transport in standalone build

Hi!
I'm trying to make a multiplayer game, using Unity Transport for communication between server and client.

I followed the tutorial here: https://docs-multiplayer.unity3d.com/transport/0.8.0/samples/jobifiedserverbehavior

I ran a standalone build and unity editor for testing.

when I ran the standalone as client and unity edtior as server, there is nothing wrong... yet.

when I ran the standalone as server and unity editor as client, I got this error:

this log provided from "development build" log file.

my code at that location: (I snipped other parts)

Code (CSharp):

1.  
2.             ServerJobHandle = _driver.ScheduleUpdate();
3.             ServerJobHandle = connectionJob.Schedule(ServerJobHandle);
4.             Debug.Log("Last step  " + (_connections.IsEmpty));
5.             ServerJobHandle = serverUpdateJob.Schedule(_connections, _connections.Length, ServerJobHandle);
6.             Debug.Log("  Exit step");
7.  

I use Unity 2020.3.0f
Unity Transport version is 0.8.0-preview.8

by the way, I can't find interface IJobParallelForDefer so I use IJobParallelFor

I only got this error when I run the standalone build as server, if I run Unity Editor as server, I don't get this error.

I suspect building to standalone version messed up some code but I have no ideas where.., some related build settings are: scripting backend: IL2CPP, managed stripping level: Low

Anyone know how to resolve this?

Thank you for reading,
Tom.


EDIT: nevermind, I will use LiteNetLib for now.