pythonが実行できません。

環境はubuntu18.10, python2.7です。
今social_mapperアプリケーションを使おうとしているのですが、なぜかできません。geckodriverも/usr/local/binに移動したのにできません。どうすればできるようになりますか？

pwd
/home/ubuntu/san/social_mapper

sudo mv geckodriver /usr/local/bin

python social_mapper.py -f imagefolder -i /home/ubuntu/san/social_mapper/image -m fast -a
/home/ubuntu/.local/lib/python2.7/site-packages/bs4/element.py:16: UserWarning: The soupsieve package is not installed. CSS selectors cannot be used.
'The soupsieve package is not installed. CSS selectors cannot be used.'
[-] Error Filling out Facebook Profiles [-]
Message: 'geckodriver' executable needs to be in PATH.
[-]
Traceback (most recent call last):
File "social_mapper.py", line 1112, in
peoplelist = fill_twitter(peoplelist)
File "social_mapper.py", line 218, in fill_twitter
TwitterfinderObject = twitterfinder.Twitterfinder(showbrowser)
File "/home/ubuntu/san/social_mapper/modules/twitterfinder.py", line 19, in init
self.driver = webdriver.Firefox()
File "/home/ubuntu/.local/lib/python2.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 164, in init
self.service.start()
File "/home/ubuntu/.local/lib/python2.7/site-packages/selenium/webdriver/common/service.py", line 83, in start
os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.
What should do?