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Traceback (most recent call last):
  File "run_openlp.py", line 71, in <module>
    start()
  File "run_openlp.py", line 67, in start
    main()
  File "C:\Users\tgc\code\more_media\openlp\core\app.py", line 430, in main
    sys.exit(application.run(qt_args))
  File "C:\Users\tgc\code\more_media\openlp\core\app.py", line 124, in run
    Registry().execute('bootstrap_post_set_up')
  File "C:\Users\tgc\code\more_media\openlp\core\common\registry.py", line 148, in execute
    result = function(*args, **kwargs)
  File "C:\Users\tgc\code\more_media\openlp\core\ui\media\mediacontroller.py", line 148, in bootstrap_post_set_up
    self.setup_display(self.preview_controller.preview_display, True)
  File "C:\Users\tgc\code\more_media\openlp\core\ui\media\mediacontroller.py", line 208, in setup_display
    self.vlc_player.setup(display, preview)
  File "C:\Users\tgc\code\more_media\openlp\core\ui\media\vlcplayer.py", line 172, in setup
    output_display.vlc_instance = vlc.Instance(command_line_options)
AttributeError: 'NoneType' object has no attribute 'Instance'