How to find a session with blueprint and steam

I have been trying to integrate steam into my project, I followed 4 tutorial, to be able to do sessions and join them with another computer in lan or online (steam ^^), i host the game On my computer and I’m search this sessions on my laptop, but I can not find any, no matter what I do, I followed in particular the tutorel of this guy (Unreal Engine 4 - Steam Multiplayer - YouTube) , I have the same version of unreal, I added the sdk 132 of steam, finally I do all the same but it does not work …
Can you help me ? If you need screenshot in particular called me, I do not know what it can come and I do not see anything strange, I do not know where the problem may come from :confused:
Thanks you Cordialy Upeaval!

(Sorry for my english i’m french :confused: )