Forge 1.8 multiplayer LAN invalid session

[Cainzer]

Hi,

 

I used to play with Forge 1.7.10, today I decided to pass to new version of Forge 1.8.

I downloaded this : forge-1.8-11.14.3.1521

It's the last one.

 

When I play alone everything is ok. But when someone hosts a game and when we try to connect through LAN, we have this error :

Authentication failure : Invalid session (try to restart the game). It's not a crash, it's just written in minecraft's window.

I searched all the morning how to solve this issue but I didn't find.

We can see the game of the guy who hosts. And before with Forge 1.7.10 we never had this trouble.

Of course if I restart the game it's useless. I think I tried all what was written on google.

 

I saw on internet that some persons played with Forge 1.8 through LAN with other players. So why wouldn't it work for me ?

 

Does anybody know the solution ?

 

Thanks

[Choonster]

Do you both own the game and have your own accounts?

 

Post the logs/fml-client-latest.log file from both clients on Gist and link them here.

[Cainzer]

My brother owns but I don't. So I don't have my own account.

 

I did several tests :

 

My computer hosts

- Logs of my computer : https://gist.github.com/anonymous/5eccb211480ff116e09d

- Logs of the other computer with official version : https://gist.github.com/anonymous/154236b3aab495ec7f30

 

Computer with official version hosts the game :

- Logs of my computer : https://gist.github.com/anonymous/82e5228b123e0db737ab

- Logs of the other computer with official version : https://gist.github.com/anonymous/4a5dd350a5656dfbfb54

 

2 computers with cracked version :

- Logs of the host : https://gist.github.com/anonymous/9f32804b070a64e075fd

- Logs of the other : https://gist.github.com/anonymous/bb8becb62e5961f4de01

 

Thank you for your help.