can't find any session/ Problem with my Multiplayer Test project.

For years i developed a lot of games but they were all single-player. Now i am following the tutorials of Unreal from Youtube for getting a least an understanding for multi-player.

So far it has been really helpfull, great tutorials until now. At this part i got bumped into a huge wall like everyone else.
Shared the link below as you can see a lot of people having this problem and still no response.

Some info and screenshots about my-end

*Steam and everything work great/ looks like we are playing Spacewar. But can’t find any session.

*Only followed the tutorials didnt do anything additional. Double checked and couldnt find anything different.

*Testing with different computers with different steam ID’s of course as it should be like i said everything same as in the tutorials.

*I shared the screenshots almost everysingle thing related or non-related that can be causing this problem. See the
Link below. It contains a rar file which contains several screenshots from my blueprints.

https://ufile.io/ic3kw

I dont know what else to say other than, ask and i will tell you anything just help me figure this out please. A lot of people are struggling with this problem this is an issue even happens in other tutorials which not posted from Unreal.

Hope you guys can help me or at least give me a direction on this.

Thanks in advance,

-Kadir