A: That is normal. The file is usually only placed on the main corporate domain ( www.riotgames.com ). Subdomains like na.leagueoflegends.com may not have one. If you are unsure, default to the Canonical URL on the main site.
Security researchers found that this file would sometimes contain instructions for the cheat client, telling it where to download updates for the hack or how to bypass Riot’s anti-cheat system, Vanguard. In a cruel irony, the file meant to debug the game became the vector for breaking it. riotgames.txt