I am trying to create documentation using Sphinx in PyCharm and it does not work. I already tried using the terminal command `make html` and it seems to work just fine. When I try to run Sphinx task in PyCharm it raises this error:

```
Traceback (most recent call last):
  File "/Applications/PyCharm.app/Contents/helpers/rest_runners/sphinx_runner.py", line 5, in <module>
    from sphinx import cmdline
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/sphinx/cmdline.py", line 24, in <module>
    from sphinx.application import Sphinx
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/sphinx/application.py", line 33, in <module>
    from sphinx.environment import BuildEnvironment
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/sphinx/environment/__init__.py", line 45, in <module>
    from sphinx.util.websupport import is_commentable
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/sphinx/util/websupport.py", line 11, in <module>
    from sphinxcontrib.websupport.utils import is_commentable  # NOQA
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/sphinxcontrib/websupport/__init__.py", line 13, in <module>
    __import__('pkg_resources').declare_namespace(__name__)
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load
  File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 646, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 616, in _load_backward_compatible
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/setuptools-28.8.0-py3.6.egg/pkg_resources/__init__.py", line 3017, in <module>
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/setuptools-28.8.0-py3.6.egg/pkg_resources/__init__.py", line 3003, in _call_aside
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/setuptools-28.8.0-py3.6.egg/pkg_resources/__init__.py", line 3045, in _initialize_master_working_set
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/setuptools-28.8.0-py3.6.egg/pkg_resources/__init__.py", line 2577, in activate
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/setuptools-28.8.0-py3.6.egg/pkg_resources/__init__.py", line 2151, in declare_namespace
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/setuptools-28.8.0-py3.6.egg/pkg_resources/__init__.py", line 2091, in _handle_ns
  File "/Users/wtekimam/PycharmProjects/doctor/myvenv/lib/python3.6/site-packages/setuptools-28.8.0-py3.6.egg/pkg_resources/__init__.py", line 2120, in _rebuild_mod_path
AttributeError: '_NamespacePath' object has no attribute 'sort'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Applications/PyCharm.app/Contents/helpers/rest_runners/sphinx_runner.py", line 7, in <module>
    raise NameError("Cannot find sphinx in selected interpreter.")
NameError: Cannot find sphinx in selected interpreter.

```

note: I use virtual environment and I already configure PyCharm to use the same virtual environment that I use to run `make html` in terminal