input submit with Behat/MinkExtension

[med004]

I have make test to add article in my project symfony but i have probleme in press input submit

this is code my feature:

Feature: ajouter

Feature: dossiertest

		@javascript
		Scenario: List 2 files in a directory
		 
		  Given I am on the homepage
		  Then I should see "hello"
		  When I go to "/ajoutermed"
		  Then I should see "ajouter"
		  And I wait 2 seconds
		  And I fill in "test_medbundle_med_section" with "test section"
		  And I fill in "test_medbundle_med_info" with "test info"
		  When I click on "ajout"
		  Then I should see "ajouter"

this is code context:

        /**
         * @When /^I click on "([^"]*)"$/
         */
        public function iClickOn($arg1)
        {
           
            $session = $this->getSession();
            $element = $this->getSession()->getPage()->findById($arg1);

        if ($element) {
            $element->click();
        } else {
            var_dump($arg1 . " could not be found");
            var_dump($element);
        }
        }

now i have this problem when i lunch my test in step " When I click on "ajout"

http://imgur.com/a/k3NJD

[stof]

the new Firefox driver for Selenium 3 is not yet fully supported, because it implements the new (draft) W3C Webdriver spec, not the Selenium Webdriver spec, and there are a few differences.
You have a few alternatives:

• stick to Selenium 2
• use Chrome rather than Firefox
• use the dev version of MinkSelenium2Driver (which contains some changes to improve the W3C Webdriver compat, even though it is still not 100% green)

[med004]

I use chromium browser because i use ubuntu 16.04 32 bits, I use selenium 3 and i make chromedriver in your path but i have this problem now when I lunched test behat http://imgur.com/a/5eJZd ,also I use selenium2 and i have also problem http://imgur.com/a/5eJZd , help me please im blocked