need help please

installed jcms 6.2.0 with no problem, created forums, but cant see the posts, not even as sv. in forums folder error log shows the next:

PHP Warning:  array_merge(): Argument #2 is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 605
[24-Dec-2015 22:44:27 UTC] PHP Warning:  strtr(): The second argument is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 605
[24-Dec-2015 22:44:27 UTC] PHP Warning:  array_merge(): Argument #2 is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 610
[24-Dec-2015 22:44:27 UTC] PHP Warning:  strtr(): The second argument is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 610
[24-Dec-2015 22:45:32 UTC] PHP Warning:  array_merge(): Argument #2 is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 605
[24-Dec-2015 22:45:32 UTC] PHP Warning:  strtr(): The second argument is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 605
[24-Dec-2015 22:45:32 UTC] PHP Warning:  array_merge(): Argument #2 is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 610

line 605 show this:

return strtr($str, ($adm ? array_merge($smileys_cache['usr'], $smileys_cache['adm']) : $smileys_cache['usr']));

line 610 show this:

return strtr($str, ($adm ? array_merge($smileys_cache['usr'], $smileys_cache['adm']) : $smileys_cache['usr']));

this is what i see as sv, only added file.

also same problem when writing mail...

PHP Warning:  array_merge(): Argument #2 is not an array in /home/changed/public_html/incfiles/classes/functions.php on line 610
[24-Dec-2015 23:34:59 UTC] PHP Warning:  strtr(): The second argument is not an array in /home/changed/public_html/incfiles/classes

this is the whole code on functions:

public static function smileys($str, $adm = FALSE)
    {
        static $smileys_cache = array();
        if (empty($smileys_cache)) {
            $file = ROOTPATH . 'files/cache/smileys.dat';
            if (file_exists($file) && ($smileys = file_get_contents($file)) !== FALSE) {
                $smileys_cache = unserialize($smileys);

                return strtr($str, ($adm ? array_merge($smileys_cache['usr'], $smileys_cache['adm']) : $smileys_cache['usr']));
            } else {
                return $str;
            }
        } else {
            return strtr($str, ($adm ? array_merge($smileys_cache['usr'], $smileys_cache['adm']) : $smileys_cache['usr']));
        }
    }