I think I came across a workaround. My issue was that I could not test my UEFN game. I would launch UEFN, and then I would launch Fortnite using the Epic Games Launcher. I can’t launch Fortnite with the launcher or even using the exe located using the file system.
I also tried clicking Launch Session and fortnite wouldn’t run. I even reinstalled the Epic Games Launcher not knowing I had to reinstall all my games, so watch out for that lol.
The way I got it work now is I didn’t realize there was another way to test your UEFN game on another computer. I had the option “Connect to Platform” set before, and I changed it back to “Launch on this PC” as in the image:
Finally Fortnite launches correctly, but I still cannot launch it using the Epic Games Launcher like before. Maybe this is intended behavior now, but I had to click the “Launch on this PC” option and it finally launches and correctly connects.
Maybe I just didn’t understand the proper workflow now, but at least this is working for me now. Hopefully this helps another in a similar situation.