Satisfactory Online Fix v4

Download the Online Fix file and copy the files in the folder where the Satisfactory is installed.

RAR Pass: rexagames.com

Sign in to your Steam account.

Start the FactoryGames.exe inside the game folder.

While the game is running, a link will open in your browser where you will need to log into your Epic Store account and grant permissions to the game.

If the in-game invite button doesn't work, invite them to play "Spacewar" using the Steam interface.

If you don't know how to do it, check out this topic: How to Play Games Online?