BOT NOT STARTING about ts3bot

[rafalohaki]

[25-Mar-2020 16:48:05 Europe/Berlin] PHP Fatal error: Uncaught Error: Call to undefined function mb_strtolower() in /root/ts3bot/bot.php:12
Stack trace:
#0 [internal function]: {closure}()
#1 /root/ts3bot/bot.php(17): spl_autoload_call()
#2 {main}
thrown in /root/ts3bot/bot.php on line 12

[rafalohaki]

bot.php:
line12: require_once 'class/'.mb_strtolower($class_name).'.class.php';

[Majcon94]

apt install php{php version}-mbstring

[rafalohaki]

apt install php{php version}-mbstring

the same error

[rafalohaki]

my full php configs: http://wpme.pl/bot/

[rafalohaki]

there is no php error log anymore but bot still not starting

[Majcon94]

Use php bot.php -i 1 and see what happens