загрузил на хостинг yii2. базу настроил. выходит такая ошибка
PHP Fatal Error – yii\base\ErrorException
Call to undefined function yii\helpers\mb_strlen()
1. in /home/laffkauz/public_html/vendor/yiisoft/yii2/helpers/BaseStringHelper.php at line 31
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{
/**
* Returns the number of bytes in the given string.
* This method ensures the string is treated as a byte array by using `mb_strlen()`.
* @param string $string the string being measured for length
* @return int the number of bytes in the given string.
*/
public static function byteLength($string)
{
return mb_strlen($string, '8bit');
}
/**
* Returns the portion of string specified by the start and length parameters.
* This method ensures the string is treated as a byte array by using `mb_substr()`.
* @param string $string the input string. Must be one character or longer.
* @param int $start the starting position
* @param int $length the desired portion length. If not specified or `null`, there will be
* no limit on length i.e. the output will be until the end of the string.
2. yii\base\ErrorHandler::handleFatalError()
