Uruchomienie testów skopiowanych z kursu zwraca błąd: unknown error. (Podstawy Automatyzacji Cz3)

Po uruchomieniu testów, pomimo iż są poprawnie przekopiowane z kursu (wraz z niezbędnymi importami i ustawieniami chromediver) występuje błąd:

Error
Traceback (most recent call last):
 File "C:\Users\jaktestowac\AppData\Local\Programs\Python\Python36-32\lib\unittest\case.py", line 59, in testPartExecutor
 yield
 File "C:\Users\jaktestowac\AppData\Local\Programs\Python\Python36-32\lib\unittest\case.py", line 605, in run
 testMethod()
 File "C:\Users\jaktestowac\PycharmProjects\demo_tests\auto_test_2.py", line 42, in test_display_error_message_when_user_submit_less_than_8_signs_id
 login_form_input_element.send_keys(login_text)
 File "C:\Users\jaktestowac\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py", line 352, in send_keys
 'value': keys_to_typing(value)})
 File "C:\Users\jaktestowac\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py", line 501, in _execute
 return self._parent.execute(command, params)
 File "C:\Users\jaktestowac\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 308, in execute
 self.error_handler.check_response(response)
 File "C:\Users\jaktestowac\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 194, in check_response
 raise exception_class(message, screen, stacktrace)

selenium.common.exceptions.WebDriverException: Message: unknown error: call function result missing 'value'
  (Session info: chrome=66.0.3359.181)
  (Driver info: chromedriver=2.32.498550 (9dec58e66c31bcc53a9ce3c7226f0c1c5810906a),platform=Windows NT 10.0.16299 x86_64)

Ran 6 tests in 15.141s
FAILED (errors=3)

Co może być przyczyną?