3.5.1 Getting 500 Internal Server Error when accessing 22222

1310 FastCGI sent in stderr: “PHP message: PHP Fatal error: Call to undefined function mb_internal_encoding() in /var/www/22222/htdocs/cache/redis/phpRedisAdmin/includes/common.inc.php on line 59 PHP message: PHP Stack trace: PHP message: PHP 1. {main}() /var/www/22222/htdocs/cache/redis/phpRedisAdmin/index.php:0 PHP message: PHP 2. require_once() /var/www/22222/htdocs/cache/redis/phpRedisAdmin/index.php:3” while reading response header from upstream, client: ...*, server: , request: “GET /cache/redis/phpRedisAdmin/ HTTP/1.1”, upstream: “fastcgi://”, host: “www.www.www:22222”, referrer: “https://www.www.www:22222/cache/redis/

try this ssh command:

apt-get install php5.6-mbstring php5.6-bcmath php5.6-xml

Thank you, the problem has been solved