Cannot launch a game

Hi!
New user of Pop_OS (Pop!_OS 22.04 LTS x86_64), I just installed Lutris (using FlatPack, from Pop!_Store) and League of Legends using Lutris.

Everything went well during the installation.
I can now run the client, select a game, a champ but then nothing happens while the game try to start.
I only have the "Reconnect" page: https://imgur.com/Il6LP5g

Please find the logs I gathered : https://pastebin.com/QVmRLAh1
Thanks for your help!
PS: I hope Kbin is the right place now Reddit is private