Raspberry Pi Installation issue

Hi!
I'm trying to install instaPy on my raspberry and I followed your [guide](https://github.com/InstaPy/instapy-docs/blob/master/How_Tos/How_to_Raspberry.md) in order to do it, but unfortunately I'm running into this error when I try I run `sudo python3 quickstart.py` and I don't know what to do:
`InstaPy Version: 0.6.8
._. ._. ._. ._. ._. ._. ._.
Workspace in use: "/root/InstaPy"
Traceback (most recent call last):
File "quickstart.py", line 33, in
headless_browser=True)
File "/usr/local/lib/python3.7/dist-packages/instapy/instapy.py", line 319, in __init__
self.logger,
File "/usr/local/lib/python3.7/dist-packages/instapy/browser.py", line 114, in set_selenium_local_session
options=firefox_options,
File "/usr/local/lib/python3.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 164, in __init__
self.service.start()
File "/usr/local/lib/python3.7/dist-packages/selenium/webdriver/common/service.py", line 98, in start
self.assert_process_still_running()
File "/usr/local/lib/python3.7/dist-packages/selenium/webdriver/common/service.py", line 111, in assert_process_still_running
% (self.path, return_code)
selenium.common.exceptions.WebDriverException: Message: Service /usr/local/bin/geckodriver unexpectedly exited. Status code was: -11
`

Thanks for the help!

The report points to How_Tos/How_to_Raspberry.md and the sudo python3 quickstart.py entry point; begin by comparing the guide with the reported Python 3.7 and geckodriver traceback. Done means the documented Raspberry Pi installation path runs quickstart.py without the reported WebDriverException, with any required guidance reflected in the guide.

索引モデルが issue の本文から書いたものです。