shinken install webui2 fails with zero information

[Rulasmur]

Hi, I've been having trouble with a clean install of shinken on centos 7

[xxx@localhost shinken]# shinken -D
[1504699866] DEBUG: [Shinken] WILL LOAD THE CLI DIR /var/lib/shinken/cli
[1504699866] DEBUG: [Shinken] We load the keywords {'search': {'args': [], 'came_from': 'shinkenio', 'description': 'Search a package on shinken.io by looking at its keywords', 'f': <function do_search at 0x1a866e0>}, 'doc-compile': {'args': [], 'came_from': 'doc', 'description': 'Compile the doc before enabling it online', 'f': <function do_compile at 0x1a86140>}, 'update': {'args': [{'name': 'pname', 'description': 'Package to update)'}, {'type': 'bool', 'name': '--local', 'description': 'Use a local directory instead of the shinken.io version'}], 'came_from': 'shinkenio', 'description': 'Grab and update a package from shinken.io. Only the code and doc, NOT the configuration part! Do not update an not installed package.', 'f': <function do_update at 0x1a86b18>}, 'publish': {'args': [{'default': '.', 'name': 'to_pack', 'description': 'Package directory. Default to .'}], 'came_from': 'shinkenio', 'description': 'Publish a package on shinken.io. Valid api key required', 'f': <function do_publish at 0x1a86578>}, 'doc-serve': {'args': [{'default': '8080', 'name': '--port', 'description': 'Port to expose the http doc. Default to 8080'}], 'came_from': 'doc', 'description': 'Publish the online doc on this server', 'f': <function do_serve at 0x1a86050>}, 'inventory': {'args': [], 'came_from': 'shinkenio', 'description': 'List locally installed packages', 'f': <function do_inventory at 0x1a867d0>}, 'install': {'args': [{'name': 'pname', 'description': 'Package to install'}, {'type': 'bool', 'name': '--local', 'description': 'Use a local directory instead of the shinken.io version'}, {'type': 'bool', 'name': '--download-only', 'description': 'Only download the package'}], 'came_from': 'shinkenio', 'description': 'Grab and install a package from shinken.io', 'f': <function do_install at 0x1a86aa0>}, 'desc': {'args': [{'default': 'host', 'name': '--cls', 'description': 'Object type to describe'}], 'came_from': 'desc', 'description': 'List this object type properties', 'f': <function do_desc at 0x1a6bde8>}}
> install webui2
[1504699869] DEBUG: [Shinken] WANT TO CALL WITH ARGS ['install', 'webui2']
[1504699869] DEBUG: [Shinken] ARGS: ['install', 'webui2']
[1504699869] DEBUG: [Shinken] CALLING<function do_install at 0x1a86aa0>WITH['webui2']and{'download_only': None, 'local': None}<type 'instance'>['__cmp__', '__doc__', '__init__', '__module__', '__repr__', '__str__', '_update', '_update_careful', '_update_loose', 'download_only', 'ensure_value', 'local', 'read_file', 'read_module']
Grabbing : webui2
[1504699869] ERROR: [Shinken] There was a critical error :
[xxx@localhost shinken]#

I have been unable to find any other information relating to this problem and was wondering if someone here can help?