为什么phantomjs不使用SplitterPython？

我想通过phantom js浏览器登录LinkedIn。我用斯普林特来做这个。splinter代码在chrome、Firefox浏览器中运行时工作正常。但是如果我将浏览器更改为phantom js，它会显示一些错误，请告诉我如何解决此问题。 没有phantom js浏览器： 从splinter导入浏览器

with Browser() as browser:
    # Visit URL
    URL = "https://www.linkedin.com/"
    browser.visit(URL)
    browser.fill('session_key', 'abc123@gmail.com')
    print("your email id entered correctly") 

It works perfectly
with phantomjs browser:
from splinter import Browser
with Browser('phantomjs') as browser:
    # Visit URL
    URL = "https://www.linkedin.com/"
    browser.visit(URL)
    browser.fill('session_key', 'abc123@gmail.com')
    print("your email id entered correctly")

错误：

Traceback (most recent call last):
  File "sampleFile.py", line 7, in <module>
    browser.fill('session_key', 'abc123@gmail.com')
  File "/usr/local/lib/python2.7/dist-packages/splinter/driver/webdriver/__init__.py", line 413, in fill
    field = self.find_by_name(name).first
  File "/usr/local/lib/python2.7/dist-packages/splinter/element_list.py", line 53, in first
    return self[0]
  File "/usr/local/lib/python2.7/dist-packages/splinter/element_list.py", line 44, in __getitem__
    self.find_by, self.query))
splinter.exceptions.ElementDoesNotExist: no elements could be found with name "session_key"

回溯（最近一次呼叫最后一次）：
文件“sampleFile.py”，第7行，在
browser.fill（'session_key'，'abc123@gmail.com')
文件“/usr/local/lib/python2.7/dist-packages/splinter/driver/webdriver/__-init__.py”，第413行，填写
field=self.find\u by\u name（name）.first
文件“/usr/local/lib/python2.7/dist packages/splinter/element_list.py”，第一行第53行
返回自我[0]
文件“/usr/local/lib/python2.7/dist packages/splinter/element_list.py”，第44行，在__
self.find_by，self.query）
splinter.exceptions.ElementDoesNotExist:找不到名为“会话\密钥”的元素