After the recent fortnite downtime, I logged in and tried playing again, keep in mind that I played just about 20 hours ago, but now when I launch fortnite it says that network security does not allow fortnite to run or open its files. I’ve done everything in my ability such as restarting my computer and going through all my network settings of the “settings” app. PS: I use a direct ethernet cable from a router and also use a windows 11 gaming laptop.
Sounds like your firewall is blocking it. Take a look at this video I just found and see if you have any luck. I’d say do it for both epic’s launcher and fortnite. Best of luck!