Селен - Повышает httplib.BadStatusLine

Я использую PhantomJS с Selenium, я хочу выполнить несколько поисков в stackoverflow. Этот код отлично работал с моим локальным компьютером, когда я заменил его на сервер с меньшим объемом оперативной памяти, он вызывает ошибку httplib.BadStatusLine. Это похоже на проблему с установками или с превышением системных спецификаций, может кто-нибудь прояснить, как это решить?

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By

start = time.time()
driver = webdriver.PhantomJS() # or add to your PATH
array = ["Python", "Javascript", "Golang", "C++", "C", "CSS", "XML", "Json", "Ruby", "Django",
     "Rails", "Java", "OpenCV", "GameMaker", "iOS", "Android", "React", "AngularJS", "React Native"]
for i in array:
    driver.get('http://stackoverflow.com/')
    sbtn = driver.find_element(By.XPATH, '//*[@id="search"]/input')
    sbtn.send_keys(i)
    sbtn.send_keys(Keys.ENTER)
    driver.save_screenshot('Photos/screen' + i + '.png') # save a screenshot to disk

Ошибка:

Traceback (most recent call last):
File "test.py", line 14, in <module>
    driver.save_screenshot('Photos/screen' + i + '.png') # save a screenshot to disk
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 798, in get_screenshot_as_file
    png = self.get_screenshot_as_png()
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 817, in get_screenshot_as_png
    return base64.b64decode(self.get_screenshot_as_base64().encode('ascii'))
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 827, in get_screenshot_as_base64
    return self.execute(Command.SCREENSHOT)['value']
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 234, in execute
    response = self.command_executor.execute(driver_command, params)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/remote_connection.py", line 408, in execute
    return self._request(command_info[0], url, body=data)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/remote_connection.py", line 478, in _request
    resp = opener.open(request, timeout=self._timeout)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1214, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1187, in do_open
    r = h.getresponse(buffering=True)
  File "/usr/lib/python2.7/httplib.py", line 1051, in getresponse
    response.begin()
  File "/usr/lib/python2.7/httplib.py", line 415, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python2.7/httplib.py", line 379, in _read_status
    raise BadStatusLine(line)
httplib.BadStatusLine: ''