So I have seen this as a recurring error for many people, and I have not managed to find a successful fix, from the community or blizzard or Bungie. The error is as follows: You must restart the application using Blizzard's Battle.net app in order to play Destiny 2. For more information, visit help.bungie.net and search for error code: buffalo This occurs straight when I launch the game and it says press enter. I press enter and then this error pops up. Blizzard support page says this: A Buffalo error may occur when logging in to Destiny 2 on multiple PCs at once. Check that you are logged out of Destiny 2 on any PC that you are not currently playing on. You may also see a Buffalo error if the game or the Blizzard Battle.net platform are in maintenance. Game maintenance will be announced in the Destiny 2 tab in the Blizzard App. Follow @BlizzardCS on Twitter for information on possible service interruptions. Visit Bungie's help page for this error for further information. There are no maintanance outages, and I only have destiny and the battle.net app installed on a single computer. I have attempted many things to solve, I have reset my network, flushed my dns, set a static IP address, reinstalled the game, and a few tricks that have worked for others such as trying a European server, and telling the app to close when launching a game. None of these worked. After telling it to close the app after launching made the game go a bit further, actually attempting to connect to the servers for a few seconds before throwing the buffalo error. I really hope someone has figured out the cause to this, because I am at a loss, and really irritated that I can not play! Not even a single time since installing the game.