UnsupportedOperationException on /mythicdungeons create — Bukkit.createWorld() called off the global region thread (Folia)

Steps to reproduce - Load MythicDungeons on a Folia server (loads fine, no startup errors). - Run /md create test classic as a player. - Command throws immediately

Stack trace

org.bukkit.command.CommandException: Unhandled exception executing command 'mythicdungeons' in plugin MythicDungeons v2.1.0-SNAPSHOT
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47)
	...
Caused by: java.lang.UnsupportedOperationException
	at org.bukkit.craftbukkit.CraftServer.createWorld(CraftServer.java:1200)
	at org.bukkit.Bukkit.createWorld(Bukkit.java:828)
	at org.bukkit.WorldCreator.createWorld(WorldCreator.java:605)
	at MythicDungeons-2.1.0-SNAPSHOT.jar//net.playavalon.mythicdungeons.commands.dungeon.MythicDungeonsCommand.handleCreateCommand(MythicDungeonsCommand.java:1113)
	at MythicDungeons-2.1.0-SNAPSHOT.jar//net.playavalon.mythicdungeons.commands.dungeon.MythicDungeonsCommand.onCommand(MythicDungeonsCommand.java:68)
	at MythicDungeons-2.1.0-SNAPSHOT.jar//net.playavalon.mythicdungeons.commands.Command.onCommand(Command.java:43)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45)
	... 21 more