I have five screen connected and the send the archives some are downloading and downloading and do not finish receiving.
We’re going to need some more information 
If you pick one of the screens that are not downloading and view the client information screen (press i in windows), then send a screen shot of it here.
It would also be interesting to know the Stats of the display in Display admin.
how many displays I can have connected to a server ?
As many as you like