Vai na sua pasta de instalação do MTGA -> MTGALauncher -> MTGALauncher.exe. Executa manualmente. Provavelmente só te falta uma atualização .

Hi.
I put in my email and password but it says authentification failed. See screenshot image joined.
Help please.

Yep, getting authentication error too, Mac

Same, “Authentication failed for ‘username.’ Unable to login, Windows

I can log in on my phone but not my PC, where I have the best experience. A support agent told me that this bug has already been reported and did nothing further. The tone of the email was pretty much "that sucks." The game is quite literally unplayable for me on PC.

Hello. Still happening. But it's the opposite for me. Can play on the phone but not on my computer

I'm getting the same thing. Played the game yesterday and today it won't let me login. Android

Error de Autenticación de cuenta.
http://prntscr.com/1egvcbw

Hi, I have experieced the same problem, but in PC, I've updated my password and the problem continue

Same issue here on PC/Windows 10

Aqui estou com o mesmo problema de Falha de autenticação.

Estou com o mesmo problema, conseguiu resolver?

bei mir auch. kommt einfach "authentifizierung fehler"

I was able to resolve this without assistance from Customer Service, who replied to my issue report with a notification that it had been reported, after which they marked my issue as "solved".

I manually launched the MTGALauncher.exe application from "C:\Program Files\Wizards of the Coast\MTGA\MTGALauncher"; the program downloaded a required update, after which I was able to log in successfully.

Same error here. Windows 10 PC.
Unable to Login
Authentication failed for <My Username>

Same issue.
It is not a password issue, putting the incorrect password or email shows the correct "invalid email address or password".
From my PC with windows 10

Same issue here on a Mac OS Big Sur 11.4

Unable to Login on PC here

As with so many others, I'm getting "Unable to login: Authentication failed for <username>" on Win 10. Log attached.

BTW - kinda BS to have a "Status" page that says everything is operational when so many people are having problems logging in.

Same Issue with me. I have uninstalled and reinstalled. I am on windows 10.