Fatal error: Uncaught Exception: \Org\Heigl\Hyphenator requires the mbstring-extension to be loaded in /var/www/restserver_external/lib/Org_Heigl_Hyphenator/src/Org/Heigl/Hyphenator/Hyphenator.php:579 Stack trace: #0 /var/www/restserver_external/lib/Org_Heigl_Hyphenator/index.php(10): require_once() #1 {main} thrown in /var/www/restserver_external/lib/Org_Heigl_Hyphenator/src/Org/Heigl/Hyphenator/Hyphenator.php on line 579