Problem with CLI in CodeIgniter

I'm trying to run CLI by following the documentation but it throws me errors and there's no way.

I am located in the main root of my project, one empty with a couple of methods in welcome.php and connection to a database.

The minimum previous configuration I have is:

$autoload['libraries'] = array('database');

$config['uri_protocol'] = isset($_SERVER['REQUEST_URI']) ? 'PATH_INFO' : 'CLI';

Function that I call:

public function test_country($country)
{
    $this->load->library('unit_test');
    $actual = $country;
    $expected = 'Japan';
    $name = 'Existe pais recibido';
    $this->unit->run($actual, $expected, $name);
    echo $this->unit->report().PHP_EOL;
    die();
}