OpenShot 2.1 doesn't start (LM 18 Xfce)

[Hachmann]

After having updated, I tried to use the current OpenShot version again (see also https://bugs.launchpad.net/openshot/+bug/1618640). In contrast to the problem on LM 17, the application now crashes on startup.

Console output:

$ openshot-qt
Loaded modules from installed directory: /usr/lib/python3/dist-packages/openshot_qt
      logger:ERROR Traceback (most recent call last):
      logger:ERROR File "/usr/bin/openshot-qt", line 9, in <module>
      logger:ERROR load_entry_point('openshot-qt==2.1.0', 'gui_scripts', 'openshot-qt')()
      logger:ERROR File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 542, in load_entry_point
      logger:ERROR return get_distribution(dist).load_entry_point(group, name)
      logger:ERROR File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2569, in load_entry_point
      logger:ERROR return ep.load()
      logger:ERROR File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2229, in load
      logger:ERROR return self.resolve()
      logger:ERROR File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2235, in resolve
      logger:ERROR module = __import__(self.module_name, fromlist=['__name__'], level=0)
      logger:ERROR File "/usr/lib/python3/dist-packages/openshot_qt/launch.py", line 53, in <module>
      logger:ERROR from classes.app import OpenShotApp
      logger:ERROR File "/usr/lib/python3/dist-packages/openshot_qt/classes/app.py", line 40, in <module>
      logger:ERROR from classes import info, settings, project_data, updates, language, ui_util, logger_libopenshot
      logger:ERROR File "/usr/lib/python3/dist-packages/openshot_qt/classes/logger_libopenshot.py", line 31, in <module>
      logger:ERROR import openshot
      logger:ERROR File "/usr/lib/python3/dist-packages/openshot.py", line 28, in <module>
      logger:ERROR _openshot = swig_import_helper()
      logger:ERROR File "/usr/lib/python3/dist-packages/openshot.py", line 24, in swig_import_helper
      logger:ERROR _mod = imp.load_module('_openshot', fp, pathname, description)
      logger:ERROR File "/usr/lib/python3.5/imp.py", line 242, in load_module
      logger:ERROR return load_dynamic(name, filename, file)
      logger:ERROR File "/usr/lib/python3.5/imp.py", line 342, in load_dynamic
      logger:ERROR return _load(spec)
      logger:ERROR ImportError
      logger:ERROR :
      logger:ERROR /usr/lib/python3/dist-packages/_openshot.cpython-35m-x86_64-linux-gnu.so: undefined symbol: _ZN8openshot12FFmpegWriter15SetAudioOptionsEbNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEiiNS_13ChannelLayoutEi

Architecture (64 bits or 32 bits) : 64bit
Operating System & version: Linux Mint 18 Xfce
Installation Method : ppa
Version of Openshot installed : 2.1.0+0+668+103+201608300650~ubuntu16.04.1 according to package management, openshot-qt --version give the same output as shown above...
MLT/melt version: 6.0.0-2
FFmpeg installation : 7:2.8.6-1ubuntu2