The command '/mw gamerule showcoordinates true world' is not working

[Papo001x]

I tried to enable coordinates in a specific world using the /gamerule command, but received a message indicating that the command does not exist. Then, I attempted to use the /mw gamerule command, which should be compatible with the MultiWorld plugin, but it also didn't work correctly.

This is the list of worlds

server.properties