Minecraft Dungeons II launched on September 29, 2026, and while most players are already smashing through the Illager Council, a chunk of the player base hit a wall before even reaching the title screen. Error code 0064 shows up alongside a "login failed" message and blocks you from launching the game entirely. There is no single universal fix, but there are several methods that have worked for players across different platforms and setups.
What causes error code 0064 in Minecraft Dungeons 2?
The error ties back to authentication and account-linking problems rather than anything wrong with the game files themselves. Your system's Minecraft Launcher, Microsoft account session, Xbox app, or even your PC's system clock can each break the login handshake that the game needs to verify your account. Steam players face an extra layer because the game has to connect your Steam identity to a Microsoft or Xbox account, which adds one more point of failure.
Error code 0029 can appear under similar conditions, so several of the fixes below apply to both.
How to fix error code 0064
Start from the top and work your way down. The first two fixes resolve the problem for most players without requiring a full reinstall.
Minecraft Dungeons 2 Guide: How to Fix Error Code 0064
Repair the Minecraft Launcher
A damaged or partially corrupted Minecraft Launcher is the most common trigger. Windows has a built-in repair tool that clears this without touching your game data.
- Open Windows Search and type Minecraft Launcher.
- Right-click the result and select App Settings.
- Scroll down and click Terminate to fully close any running instance.
- Click Repair and wait for Windows to finish.
- Reopen the Minecraft Launcher, select Minecraft Dungeons 2, and check whether the error is gone.
This takes under two minutes and fixes the issue for a significant number of players.
Sync your system clock
This one catches people off guard. If your PC's date, time, or time zone is even slightly off, the authentication servers reject the login request. It affects both single-player startup and multiplayer modes.
- Search Change the date and time in Windows Search and open the settings page.
- Confirm your Time Zone is correct, either by selecting it manually from the dropdown or enabling Set time automatically.
- Scroll to Additional settings and click Sync now.
- Restart the Minecraft Launcher and try launching the game again.
Sign out and back into your Microsoft account
Your Minecraft Launcher authentication session can expire or corrupt without any visible warning. Refreshing it takes about 30 seconds.
- Open the Minecraft Launcher and click on your Microsoft account profile in the top-left corner.
- Select Log Out.
- Sign back in with the same Microsoft account credentials tied to your game purchase.
- Launch Minecraft Dungeons 2 again.
This is especially worth trying if the error message specifically says "login failed" rather than displaying a generic startup error.
Update the Xbox App and Xbox Game Bar
Players who access the game through Xbox Game Pass or who have the Xbox app installed should check for pending updates. An outdated Xbox App can interfere with account authentication.
- Open the Microsoft Store and search for Xbox and Xbox Game Bar separately.
- Install any available updates for both.
- Restart your PC and try launching the game.
Confirm your Xbox App account matches your purchase account
If the Microsoft account signed into your Xbox app differs from the one you used to buy or activate the game, the authentication check will fail every time.
- Open the Xbox app on Windows.
- Check which Microsoft account is currently signed in.
- If it does not match the account tied to your Minecraft Dungeons 2 license, sign out and sign in with the correct account.
- Relaunch the game.
Link your Steam account to your Xbox or Microsoft account
Steam players have an extra requirement: the game needs your Steam identity linked to a Microsoft or Xbox account before it can authenticate. If that link was never established or broke during installation, error 0064 and error 0029 both appear.
Complete the account-linking process through the Xbox or Microsoft account portal, then restart the game.
Reinstall Minecraft Dungeons 2
Save this for last. Corrupted installation files can cause persistent errors that none of the above methods touch, but reinstalling takes significantly more time than every other fix combined.
- Open Windows Search, type Add or Remove Programs, and press Enter.
- Find Minecraft Dungeons 2 in the list.
- Click the three-dot menu next to it and select Uninstall.
- Once removed, open the Minecraft Launcher and reinstall the game from your library.
- Launch it and check whether error 0064 is still present.
What to do once you're back in
Once the error clears, there is plenty to get into. If the new mechanics feel overwhelming, the Minecraft Dungeons II ultimate beginner's guide covers all 12 gear slots and the possession system in detail. If you want to play with friends across platforms, check out the crossplay and cross-progression setup guide to get your squad connected. For a full rundown of everything else available in the game, the Minecraft Dungeons II guides collection has you covered.