An error occurred while playing multiplayer with the map I made,"map_meta.bin could not be saved"

[leejjangdol]

I tested it with the map I made.

Single play works well without any problems, but when I try multi-play, this phrase comes out, making it impossible to play.

 

"you have been kicked from this server because map_meta.bin could not be saved."

 

It's hard because I don't know what the problem is.What should I do?