This is my problem:

$I->selectOption('#country', "/admin/charters/index/68"); 
Exception thrown Symfony\Component\CssSelector\SyntaxError: 
Unexpected symbol: / at 16 Stack trace: 
#1 tokenizeSymbol /Symfony/Component/CssSelector/Tokenizer.php:97
#2 /Symfony/Component/CssSelector/CssSelector.php:93 
#3 /Symfony/Component/CssSelector/CssSelector.php:61 
#4 /Codeception/vendor/Symfony/Component/DomCrawler/Crawler.php:516 
#5 /Codeception/src/Codeception/Util/Framework.php:245

if $I->selectOption('#country', "68"); it's all work

fix

if (!preg_match('#[^\w\-/]#', $s, $match, PREG_OFFSET_CAPTURE, $pos)) {
            // Goes to end of s
            return array(substr($s, $start), strlen($s));
        }