Are you encountering the “MTG Arena authentication failed” error when you play MTG Arena? What to do when you meet the issue? You come to the right place and you can find some simple and effective methods to fix the issue from this post offered by MiniTool.

MTG Arena is the abbreviation of Magic The Gathering Arena. It is a free-to-play digital collectible card game developed and published by Wizards of the Coast. When you play it, you may encounter the “MTG Arena authentication failed” issue.

Solution 1: Restart Your Device

The easiest and quickest way to get rid of the “MTG Arena authentication failed” issue is to restart your device. Most of the time, restarting your devices can solve the problems. If restarting your device is not working, you can try the following solutions.

Solution 2: Restart Your Modem and Router

If your modem or router doesn’t work properly, the DNS server could stop responding, either.  You can restart your modem and router if you have one to solve the problem. Firstly, you need to unplug the power cable from the electrical outlet and then wait a few minutes. Next, plug your modem back. Finally, press the power button to turn on your device.

Solution 3: Check Server Status

Is MTG Arena down? You should check the official MTG Arena server status webpage to ensure there is no downtime or disruption at this time. In the unlikely event that there is a problem with the game server, we recommend that you wait a few hours and try again. Keep in mind that server outages may take longer than expected in some situations or regions.

Solution 4: Disable Antivirus and Firewall Software

To fix the “unable to login authentication failed” error, you can also try to disable antivirus and firewall software temporarily. To disable Windows Defender temporarily, you can refer to this post: 3 Ways to Disable Windows Defender Antivirus on Windows 10.

After you temporarily disable Windows Defender, wait for a few minutes and check to see if the issue has been fixed. After fixing the issue, it’s recommended to turn on the antivirus again.

Solution 5: Reinstall Magic: The Gathering Arena

One possible way to fix MTG Arena can't log in authentication failed error is to reinstall the game. First, uninstall MTG Arena and wait for the game files to be removed from your device storage. After that, restart your gaming device (PC or mobile). Now get the latest version of MTG Arena and install it. Finally, launch it to confirm the current state of the game.

Solution 6: Contact Game Support

If none of the methods provided so far have helped you, you should contact game support. They'll replay you as soon as possible, so please be patient until you get the right answer from MTG Arena support to fix your problem.

Also see: What to Do If MTG Arena Won't Launch? [3 Methods]

Final Words

This post introduces 6 ways for you to get rid of the “MTG Arena authentication failed” issue. You can try them one by one until you fix the issue. I hope that this post can be helpful to you.

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