Yesterday, I changed my profile name. Now I can't play online anymore.

When I log on, it says

Account not authenticated with minecraft.net


Non-Valid Username.

  • 1
    Are you sure it can only be the change in username? You haven't changed anything else?
    – Joachim
    Aug 19, 2019 at 8:34
  • 1
    Did you have internet problems while starting the game or while trying to connect to the server? Even just a slow connection? Or are you maybe playing in a very old version of Minecraft? Aug 19, 2019 at 13:28

1 Answer 1


Did you try logging out and logging back in on the Minecraft Launcher? Many times I ran into this problem and this solved the problem.

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