League of Legends error code 003 is one of the most frustrating problems you have to deal with in the game because it only occurs when a new patch is added. While you should be enjoying the new content and understanding the evolving meta, you are instead dealing with troubleshooting.
Here are the best ways to fix League of Legends error code 003 so you never have to experience problems on patch day again.
What causes error code 003 in League of Legends?
Server problems: In some cases, the error is due to server issues. Servers are often undergoing maintenance to update, or there may be a specific error that prevents you from installing the game.