Cocos2dx - error when using sdkbox to import plugins

I'm using sdkbox (v0.5.6.7) in a Cocos2dx (v3.7.1) project but every time I run sdkbox it gives the following error:

$> sdkbox import facebook
 _______ ______  _     _ ______   _____  _     _
 |______ |     \ |____/  |_____] |     |  \___/ 
 ______| |_____/ |    \_ |_____] |_____| _/   \_
Copyright (c) 2015 Chukong Technologies Inc. v0.5.6.7

Traceback (most recent call last):
  File "monolith.py", line 4327, in <module>
  File "monolith.py", line 4312, in main
  File "monolith.py", line 3507, in perform
  File "monolith.py", line 3515, in perform
  File "monolith.py", line 3979, in main
  File "monolith.py", line 3507, in perform
  File "monolith.py", line 3515, in perform
  File "monolith.py", line 4195, in cmd_import
  File "monolith.py", line 3949, in load_projects
  File "monolith.py", line 3666, in load_xcode_project
  File "monolith.py", line 2161, in initialize
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in     _execute_child
    raise child_exception
OSError: [Errno 2] Arquivo ou diretório não encontrado

This same error occurred while testing sdkbox with version 3.6 of cocos2dx , so I updated it because I thought it was an error in the installation I made of sdkbox (because before 3.7 it did not come with framework) or anything with version 3.6. After I updated the error persists. I already asked google uncle and nothing.

I did not move at all; what I did was install version 3.7.1 through setup.py , then I created a project from scratch, so I copied my source files that were from the other project, and I tried to import the plugin, but it gives this error. The project looks beautiful, builds executables quietly, but I can not use sdkbox . Does anyone know what's wrong?