SessionNotCreatedException: Message: Expected browser binary location, but unable to find binary in default location error with Selenium and Firefox

Question

I don't know why but yeasterday and the day before it worked but today no. I changed nothing and the PATH is always at the same place.

from selenium import webdriver
from selenium.webdriver.firefox.service import Service
from selenium.webdriver.common.by import By
from webdriver_manager.firefox import GeckoDriverManager
import pandas as pd
import re
import time



driver = webdriver.Firefox(executable_path=GeckoDriverManager().install())
driver.get(("https://cordis.europa.eu/search/fr?q=contenttype%3D%27project%27%20AND%20programme%2Fcode%3D%27H2020%27&p=1&num=10&srt=/project/contentUpdateDate:decreasing"))

I have that big error message :

--------------------------------------------------------------------------
SessionNotCreatedException                Traceback (most recent call last)
C:\Users\JOHAN~1.ROC\AppData\Local\Temp/ipykernel_6336/1824966143.py in <module>
----> 1 driver = webdriver.Firefox(executable_path=GeckoDriverManager().install())
      2 driver.get(("https://cordis.europa.eu/search/fr?q=contenttype%3D%27project%27%20AND%20programme%2Fcode%3D%27H2020%27&p=1&num=10&srt=/project/contentUpdateDate:decreasing"))
      3 
      4 
      5 #link = driver.find_element(By.XPATH,"/html/body/app-root/ng-component/main/div/div/section[2]/section[2]/app-card-search[1]/div/div[2]/a")

~\Anaconda3\lib\site-packages\selenium\webdriver\firefox\webdriver.py in __init__(self, firefox_profile, firefox_binary, timeout, capabilities, proxy, executable_path, options, service_log_path, firefox_options, service_args, desired_capabilities, log_path, keep_alive)
    168             executor = FirefoxRemoteConnection(
    169                 remote_server_addr=self.service.service_url)
--> 170             RemoteWebDriver.__init__(
    171                 self,
    172                 command_executor=executor,

~\Anaconda3\lib\site-packages\selenium\webdriver\remote\webdriver.py in __init__(self, command_executor, desired_capabilities, browser_profile, proxy, keep_alive, file_detector, options)
    155             warnings.warn("Please use FirefoxOptions to set browser profile",
    156                           DeprecationWarning, stacklevel=2)
--> 157         self.start_session(capabilities, browser_profile)
    158         self._switch_to = SwitchTo(self)
    159         self._mobile = Mobile(self)

~\Anaconda3\lib\site-packages\selenium\webdriver\remote\webdriver.py in start_session(self, capabilities, browser_profile)
    250         parameters = {"capabilities": w3c_caps,
    251                       "desiredCapabilities": capabilities}
--> 252         response = self.execute(Command.NEW_SESSION, parameters)
    253         if 'sessionId' not in response:
    254             response = response['value']

~\Anaconda3\lib\site-packages\selenium\webdriver\remote\webdriver.py in execute(self, driver_command, params)
    319         response = self.command_executor.execute(driver_command, params)
    320         if response:
--> 321             self.error_handler.check_response(response)
    322             response['value'] = self._unwrap_value(
    323                 response.get('value', None))

~\Anaconda3\lib\site-packages\selenium\webdriver\remote\errorhandler.py in check_response(self, response)
    240                 alert_text = value['alert'].get('text')
    241             raise exception_class(message, screen, stacktrace, alert_text)
--> 242         raise exception_class(message, screen, stacktrace)
    243 
    244     def _value_or_default(self, obj, key, default):

SessionNotCreatedException: Message: Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line

If you have an idea of why it why it does not work and why doesn't it work anymore.

Answer 1

Possibly the issue is with get(). While invoking get() you need to pass the url_string as the argument. So instead of get(("url_string")) it should have been get("url_string").

Effectively, your line of code would be:

driver.get("https://cordis.europa.eu/search/fr?q=contenttype%3D%27project%27%20AND%20programme%2Fcode%3D%27H2020%27&p=1&num=10&srt=/project/contentUpdateDate:decreasing")