When they try to launch the game, it does not launch, and sometimes, it shows in the task manager for some time before it disappears again. Many users have recently reported that they experienced an issue with the game. It seems like the perfect game that anybody will enjoy, but like everything that has to do with tech, issues will pop up from time to time. League of Legends is played all over the world, and it is one of the most-played online games. It is a multiplayer online battle arena (MOBA) game, which has made quite a wave since its release in 2009 for both Windows and Mac operating systems. League of Legends is one of those games that a lot of avid gamers have come to love. 1.6 Solution 4: Replace the Projects Folder.1.5 Solution 3: Close the Applications running in the background.1.4 Solution 2: Grant the game administrative privileges.1.3 Solution 1: Launch the game directly.1.2 Solutions for League of Legends won’t Open.1.1.5 Other applications running in the background.1.1 Common Causes of League of Legends won’t Open.1 How to Fix League of Legends won’t Open.