Last Friday, I have received a login authentication failure on my computer. It does affect the Windows PC version on MTG Arena, but I haven't tried it on the Steam version. If you have a similar issue like this, please let me know. It just happens when you try to log in the game. However, if you have the Android version of the game, it should work with a free download, as long as you have the right specs. I don't know if there are other factors that make up this bug but be vigilant if you have the Windows PC version. If you do recieve this bug, it should say "Login Failed" on the first line, then "Authentication Failed for (your username)" on the second line: all in a black screen. I'm not sure if it affects the Aetherdrift version but be aware. This is the first time I've ever encountered this issue after over 5 years of gameplay.