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This does not work in his case.
I deleted the broken world, and applied another small fix to your server. Don't forget to remove the world also from your multiworld plugin configuration.
Please check if you still have this problem when generating new worlds.
the problem is still
If you're trying to delete a world, type /mvremove eeuu command, which only affect the config, not the entire world generation.
To fully remove it, simply delete that world in https://aternos.org/worlds.
i tried
I tried again to create a new world with the plugin but the server keeps stopping before I finished doing it. I can't do anything anymore because it's always the same.
What is the address of the server in question?
What is the name of the broken world?
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Hí, i have an error with the MultiverseCore plugin & my Aternos server.
Tonight I tried to generate a new normal world on my 1.14.4 server with the MultiverseCore plugin but when the world was about to finish generating, the server suddenly stopped. When I turned on the server again, the new world had not been generated and it showed an error in the register of aternos and the secondary world that I already had before this, just disappeared. I tried deleting the corrupted worlds via the / mvdelete command but it didn't work. I reinstalled my server but the error keeps happening the same way and I am very frustrated. 
Attached
link of the record of my last attempt: https://mclo.gs/BIPqRBO
Extra information:
-Initially i had two normal worlds that he used regularly with no problem.
-I also can't delete the corrupted worlds from the Aternos because they don't appear in my world list.
-I have four more plugins on the server.
I hope you can help me, thank you very much in advance. 
