error when node robot starts

on revision: 51dd37f79669eb3f005e460d1d910666c5c2021a
tes.git /opt/code/github/threefoldtech/0-templates
Traceback (most recent call last):
  File "usr/local/bin/zrobot", line 6, in <module>
    exec(compile(open(__file__).read(), __file__, 'exec'))
  File "/opt/code/github/threefoldtech/0-robot/cmd/zrobot", line 26, in <module>
    entry_point()
  File "/opt/code/github/threefoldtech/0-robot/zerorobot/cli/server.py", line 122, in start
    robot.set_config_repo(config_repo, config_key)
  File "/opt/code/github/threefoldtech/0-robot/zerorobot/robot/robot.py", line 79, in set_config_repo
    config.config_repo = config.ConfigRepo(url=url, key=key)
  File "/opt/code/github/threefoldtech/0-robot/zerorobot/config/config_repo.py", line 21, in __init__
    self._init(url, key)
  File "/opt/code/github/threefoldtech/0-robot/zerorobot/config/config_repo.py", line 68, in _init
    j.tools.configmanager.init(silent=True, configpath=path, keypath=key)
  File "/opt/code/github/threefoldtech/jumpscale_core/Jumpscale/tools/configmanager/IConfigManager.py", line 225, in init
    j.clients.sshkey.key_get(keypath, load=True)
  File "/usr/lib/python3/dist-packages/jumpscale.py", line 416, in sshkey
    from Jumpscale.clients.sshkey.SSHKeys import SSHKeys as SSHKeys
  File "/opt/code/github/threefoldtech/jumpscale_core/Jumpscale/clients/sshkey/SSHKeys.py", line 7, in <module>
    from .AgentSSHKeys import *
  File "/opt/code/github/threefoldtech/jumpscale_core/Jumpscale/clients/sshkey/AgentSSHKeys.py", line 1, in <module>
    from paramiko.agent import AgentSSH, cSSH2_AGENTC_REQUEST_IDENTITIES, SSH2_AGENT_IDENTITIES_ANSWER, SSHException, AgentKey, Agent
  File "/usr/local/lib/python3.5/dist-packages/paramiko/__init__.py", line 22, in <module>
    from paramiko.transport import SecurityOptions, Transport
  File "/usr/local/lib/python3.5/dist-packages/paramiko/transport.py", line 90, in <module>
    from paramiko.ed25519key import Ed25519Key
  File "/usr/local/lib/python3.5/dist-packages/paramiko/ed25519key.py", line 17, in <module>
    import bcrypt
  File "/usr/local/lib/python3.5/dist-packages/bcrypt/__init__.py", line 25, in <module>
    from bcrypt import _bcrypt
ImportError: /usr/local/lib/python3.5/dist-packages/_cffi_backend.cpython-35m-x86_64-linux-gnu.so: undefined symbol: ffi_type_void
threefoldtecharchive / 0-robot

error when node robot starts #46
