Online subsystem steam not working...?

Heya guys.

This topic might been here quiet alot here but cant find the solution for my situation.

I have followed Unreal Engine 4 Tutorial - Online Sessions Part 4: Connecting to Steam - YouTube to get started with it but sadly no positive result.

When I open the game standalone or outside UE5 editor the overlay of steam is shown but it wont do anything when I click the button to create a session. but when I run it within Editor window the game wont show the steam overlay and I can create and join the session.

The method to create the session and send the playere to the game lobby

The on click event on the button (to start creating a session)

Can someone push me in the right direction to get it working?
(Sorry if its a newbie question. Im new into unreal engine and especially blueprints. Im trying to learn.)