Help with Server Pokemon Markz88 MMO STARTER KIT [RPG Maker XP]

[Whunp]

Good evening, I can not get the server of the game and the editor who told me error RGSS player , can you help me?



UP :

Error :


Thu Aug 20 01:07:52 Paris, Madrid (heure d’été) 2015:
cannot convert nil into String
(RMX-OS) Script:912:in `+'
(RMX-OS) Script:912:in `listen'
(RMX-OS) Script:5750:in `waiting_for_server'
(RMX-OS) Script:5562:in `waiting?'
(RMX-OS) Script:5698:in `update'
(RMX-OS) Script:5427:in `main'
(RMX-OS) Script:5424:in `loop'
(RMX-OS) Script:5429:in `main'
(RMX-OS) Main:47


Screen:
http://prntscr.com/86muxc