Fail to import Vungle Plugin

I fail to install the ad module “vungle”

here is the message shown:

sdkbox import vungle
  _______ ______  _     _ ______   _____  _     _
  |______ |     \ |____/  |_____] |     |  \___/ 
  ______| |_____/ |    \_ |_____] |_____| _/   \_
 Copyright (c) 2015 SDKBOX Inc. v1.0.0.13
 Installation Successful :)
 'NoneType' object has no attribute 'get_value'
 Installation failed :(

Can you try again? Maybe the server is not update to date back then…