I can't play the Extreme Football Throwdown gamemode !

Hello

I have a Garry’s mod server and i set the gamemode to extreme football throwdown and when i connect to server the game is close,when the load is say sending client info… no error message or anything only the game is close.
And when i connect to offical extreme football throwdown server i have a same problem… a month ago i play the gamemode and it works perfectly.