Misleading information

I just downloaded The game since I just updated to the latest iOS. Everything was fine and the game is suppose to be compatible with my iPhone 6 but as soon as I try and open the game, i am shown a pop up explaining that I need to free up space on my phone (I have excess amount of space on my phone) and that the game is compatible with iPhone 6s or later. The confusing part is that in the game description it is said that iPhone 6 is compatible but yet I am told otherwise. I’d really like to try out the game so If the issue can be fixed, I’d really appreciate it!

Emiolyy about Fortnite, v3.4.2