Steps to reproduce:
Click Create New World on world selection screen
Go into More World Options and select world type Superflat
Click Create New World.
When you click on this button, game crashes.
MC-128954
Crash when trying to create a superflat world
Resolved
Invalid
0
Thank you for your report!
However, this issue is Invalid.
Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.
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