[1.20.1] Multiverse/MultiWorld/WorldManage cannot create world

[pypaae]

Minecraft Version : 1.20.1

Mohist Version : Mohist - 1.20.1-890

Operating System : Windows 10

Concerned plugin :

1. Multiverse
   https://modrinth.com/plugin/multiverse-core
2. MultiWorld
   https://modrinth.com/plugin/multiworld-bukkit/versions
3. WorldManage
   idk (mb core/bukkit?)

Logs : https://pastebin.com/zhVw6qLd

Steps to Reproduce :

1. /worlds create world_test | /mv create world_test normal -t flat
2. Then plugin writes in chat : "Failed!"
3. After the server crashes.

Description of issue : This problem occurs only on Mohist

[pypaae]

Multiverse logs: https://pastebin.com/wAVtbj40

[pypaae]

Import/clone also doesn't work

[OneWorldStudio]

Import/clone also doesn't work

Delete mod valkyrienskies