Traceback (most recent call last):
  File "run_tribler.py", line 94, in <module>
    start_tribler_core(base_path, api_port)
  File "run_tribler.py", line 45, in start_tribler_core
    from Tribler.Core.Session import Session
  File "/usr/share/tribler/Tribler/Core/Session.py", line 20, in <module>
    from Tribler.Core.APIImplementation.LaunchManyCore import TriblerLaunchMany
  File "/usr/share/tribler/Tribler/Core/APIImplementation/LaunchManyCore.py", line 20, in <module>
    from Tribler.Core.Modules.search_manager import SearchManager
  File "/usr/share/tribler/Tribler/Core/Modules/search_manager.py", line 8, in <module>
    from Tribler.community.search.community import SearchCommunity
  File "/usr/share/tribler/Tribler/community/search/community.py", line 13, in <module>
    from Tribler.Core.TorrentDef import TorrentDef
  File "/usr/share/tribler/Tribler/Core/TorrentDef.py", line 14, in <module>
    from Tribler.Core.Utilities import maketorrent
  File "/usr/share/tribler/Tribler/Core/Utilities/maketorrent.py", line 16, in <module>
    from Tribler.Core.Utilities.utilities import create_valid_metainfo
  File "/usr/share/tribler/Tribler/Core/Utilities/utilities.py", line 16, in <module>
    from twisted.internet.ssl import ClientContextFactory
  File "/usr/lib/python2.7/site-packages/twisted/internet/ssl.py", line 59, in <module>
    from OpenSSL import SSL
ImportError: No module named OpenSSL
INFO    1548843272.75               run_tribler:139  (root)  Shutting down Tribler