Deprecated: The mbstring.func_overload directive is deprecated in Unknown on line 0

Fatal error: Uncaught UnexpectedValueException: Overloading of string functions using mbstring.func_overload is not supported by phpseclib. in /var/www/clients/client1/web691/web/vendor/phpseclib/phpseclib/phpseclib/bootstrap.php:17 Stack trace: #0 /var/www/clients/client1/web691/web/vendor/composer/autoload_real.php(41): require() #1 /var/www/clients/client1/web691/web/vendor/composer/autoload_real.php(45): {closure}() #2 /var/www/clients/client1/web691/web/vendor/autoload.php(22): ComposerAutoloaderInita19a915ee98347a0c787119619d2ff9b::getLoader() #3 /var/www/clients/client1/web691/web/inc/load.php(69): require_once('/var/www/client...') #4 /var/www/clients/client1/web691/web/inc/load.php(13): class@anonymous->__construct() #5 /var/www/clients/client1/web691/web/inc/init.php(206): require_once('/var/www/client...') #6 /var/www/clients/client1/web691/web/doku.php(38): require_once('/var/www/client...') #7 {main} thrown in /var/www/clients/client1/web691/web/vendor/phpseclib/phpseclib/phpseclib/bootstrap.php on line 17