pgAdmin4 - Session file name too large

2016-04-15 13:31:47,820: ERROR werkzeug: Error on request:
Traceback (most recent call last):
File "/Users/myuser/pgadmin4/venv/lib/python2.7/site-packages/werkzeug/serving.py", line 177, in run_wsgi
execute(self.server.app)
File "/Users/myuser/pgadmin4/venv/lib/python2.7/site-packages/werkzeug/serving.py", line 165, in execute
application_iter = app(environ, start_response)
File "/Users/myuser/pgadmin4/venv/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/Users/myuser/pgadmin4/venv/lib/python2.7/site-packages/flask/app.py", line 1813, in wsgi_app
ctx.push()
File "/Users/myuser/pgadmin4/venv/lib/python2.7/site-packages/flask/ctx.py", line 321, in push
self.session = self.app.open_session(self.request)
File "/Users/myuser/pgadmin4/venv/lib/python2.7/site-packages/flask/app.py", line 825, in open_session
return self.session_interface.open_session(self, request)
File "/Users/myuser/pgadmin4/web/pgadmin/utils/session.py", line 209, in open_session
return SqliteSessionStorage(self.directory, sid)
File "/Users/myuser/pgadmin4/web/pgadmin/utils/session.py", line 60, in __init__
sess_db = os.open(self.path, os.O_CREAT, int("600", 8))
OSError: [Errno 63] File name too long: '/Users/myuser/.pgadmin/sessions/.eJxNkUtvozAUhf_KyOto....'