FOSS gamedev and creative worlds

Whenever i connect to address minetest.0gb.us , port 30001, after it loaded all of its textures, it says that ERROR: CLIENT DISCONNECTED. Why? and how can i connect properly?

IIRC this problem appears when the server is shutting down while the client is loading the media.

But i tried it again and again and it still says client disconnected while many players are still playing on it!