It doesn't seem to work for me , i can't submit any run from LiveSplit. All it says is "You need to specify the platform of the game" even though it's already specified. i'm kinda lost there

Can you post screenshots? It'll help us figure out what is going on :)

https://imgur.com/43ZLkto https://imgur.com/d6b8Tw9 https://imgur.com/gyf3c7D https://imgur.com/pOGQBL7

Hope this works, i don't know imgur ^^

Since you're on console, don't even worry about sharing from LiveSplit. Unless you somehow tied it to the actual game (which has been done before) to make it match IGT, then the timer is going to give a different result and will most likely be RTA. Splits on console are there primarily for the runner to know what their pace is, not to actually submit as part of their run. Just upload your run with the IGT and final typewriter save at the end and we'll be able to verify it.

Okay thanks