I don't play battle royals, I bought "Fortnite" (save the world) in the first day, mine was the last to be sold in the game store.
Since the 3.5 patch almost never I could enter the game. I am sure it isn't fault my computer, because to test I installed "Paragon" and "Unreal Tourneament", both by Epic Games, and I could login and play a game if I wanted, then the root of the error is the servers, now too busy because Fornite is maybe the most popular free-to-play videogame.