Anvil MAP on Pocketmine Server

Hello, I wish if it is possible to put an anvil map on my server and if the answer is "yes" how to do that?

 

put it in worlds folder

 

I have an error in the console :

HTML:

[36m[20:23:44] [m[31m[Server thread/ERROR]: Could not load level "world": Cannot identify format of world[m
[36m[20:23:44] [m[31m[Server thread/EMERGENCY]: No default level has been loaded[m