On launch day the most common reason Minecraft Dungeons II would not start on PC was the Microsoft account. The game asks to link or verify an account when it opens; when that fails it stops with an error code. Players reported 0029 and 0064 most often, and 0060 with a "Verification Failed" message. The account sign-in was the second most common complaint in Steam's negative reviews that evening.
These fixes come from players and launch-day guides, not from Mojang or Microsoft, which had not posted an official fix by the evening of September 29. Try them in order and restart the game after each.
1. Update the Xbox app and Xbox Game Bar from the Microsoft Store. Pending updates to either were the most reported cause of the link failing.
2. Open the Xbox app and make sure you are signed in, with the same Microsoft account you use in the game.
3. On Steam, link your Steam account to your Xbox account: in the Xbox app, open your profile, then Settings, and link Steam at the bottom of the list.
4. Do not run the game as administrator. Running it elevated appears to break the Steam link and bring back error 0029; untick "Run this program as an administrator" in the executable's Compatibility properties.
5. For 0064, set Windows to sync the date and time automatically, sign out of your Microsoft account in the game and back in, and repair the Minecraft Launcher from its App settings if you play through it.
6. Check Windows Update and your graphics driver; one player's 0060 cleared after both were updated. Reinstalling the game is the last resort.
Frequently asked questions
What is error 0029 in Minecraft Dungeons II?
A Microsoft account sign-in or link failure on PC. Players cleared it by updating the Xbox app and Game Bar, linking Steam to their Xbox account and not running the game as administrator.
How do I fix error 0064 in Minecraft Dungeons II?
Sync Windows' date and time automatically, sign out of your Microsoft account and back in, update the Xbox app, and repair the Minecraft Launcher if you use it.
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