Q:

Can't select my field and also I can't write there with codeception

I'm trying to write a small test where I login to my chosen page. I want to write my email address to login field and press the button to login. However, I receive an error that I miss argument in my fillField function. 

[ArgumentCountError] Too few arguments to function AcceptanceTester::fillField(), 1 passed in C:\Users\Henrikas\tests\acceptance\LoginCest.php on line 11 and exactly 2 expected

Here's my code: public function successTest(AcceptanceTester $I)
 {

        $I->wantTo("Created test case for login");
        $I->amOnPage('page');
        $I->fillField(['input' => '.form-control', "myEmailAddress"]);
        $I->click("//button[@class='btn btn-primary btn-block btn-rounded text-uppercase']");
}
}

And error picture:

HTML code from my webiste:

A:

The fillField method of codeception takes two parameters of type string
1. The selector
2. The value
You have provided an array in both cases. 
You might want to write the test case using xpath like this
public function successTest(AcceptanceTester $I)
{
    $I->wantTo("Created test case for login");
    $I->amOnPage('page');
    $I->fillField("//input[@type='text']", "myEmailAddress");
    $I->click("//button");
}

Depending on how your button element is.

