The Pokémon Go app launched in select countries including the United States on July 6, and has since launched in more than 35 countries.
To fix the issue, users will need to sign in with the e-mail address they originally used to create their account on Pokémon Go.
Finally, the staff promised to bring the game to more countries, including Brazil, where athletes and guests are gathering for the 2016 Rio Olympics.
The developers also said that it has removed third-party apps such as PokéVision, which maps where Pokémon can be found, due to problems they caused in the main game.