Apache showing Permission denied: flask_session error
You should specify which type of session interface to use.
Try to set the SESSION-TYPE to "null".
Im trying to get flask with virtual environment and wsgi configured to work but Apache keeps giving me this error: 

[Tue Nov 13 13:23:55.179153 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]     app.session_interface = self._get_interface(app)
[Tue Nov 13 13:23:55.179160 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]   File "/var/www/html/project/python/lib/python3.6/site-packages/flask_session/init.py",
  line 93, in _get_interface
[Tue Nov 13 13:23:55.179163 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]     config['SESSION_USE_SIGNER'], config['SESSION_PERMANENT'])
[Tue Nov 13 13:23:55.179169 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]   File "/var/www/html/project/python/lib/python3.6/site-packages/flask_session/sessions.py",
  line 314, in init
[Tue Nov 13 13:23:55.179172 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]     self.cache = FileSystemCache(cache_dir, threshold=threshold, mode=mode)
[Tue Nov 13 13:23:55.179177 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]   File "/var/www/html/project/python/lib/python3.6/site-packages/werkzeug/contrib/cache.py",
  line 717, in init
[Tue Nov 13 13:23:55.179180 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]     os.makedirs(self._path)
[Tue Nov 13 13:23:55.179185 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]   File "/lib64/python3.6/os.py", line 220, in makedirs
[Tue Nov 13 13:23:55.179188 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx]     mkdir(name, mode)
[Tue Nov 13 13:23:55.179215 2018] [wsgi:error] [pid 11819] [x.x.x.x:xxxx] PermissionError: [Errno 13] Permission denied: '/flask_session'

I tried giving the project different permissions but nothing worked