Won't start

New DO droplet. All installed as in manual and:

~/instapy-quickstart/quickstart_templates# python3 good_commenting_strategy_and_new_qs_system.py
InstaPy Version: 0.6.3
._. ._. ._. ._. ._. ._. ._.
Workspace in use: "/root/InstaPy"
Traceback (most recent call last):
File "good_commenting_strategy_and_new_qs_system.py", line 29, in
proxy_port='', headless_browser=True)
File "/usr/local/lib/python3.5/dist-packages/instapy/instapy.py", line 321, in __init__
self.logger,
File "/usr/local/lib/python3.5/dist-packages/instapy/browser.py", line 114, in set_selenium_local_session
options=firefox_options,
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
keep_alive=True)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
self.start_session(capabilities, browser_profile)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
self.error_handler.check_response(response)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.SessionNotCreatedException: Message: Unable to find a matching set of capabilities