Fatal error: Uncaught Error: Undefined constant "Patchwork\Utf8\MB_OVERLOAD_STRING" in /customers/9/2/c/psychomusic.de/httpd.www/phpBB3/vendor/patchwork/utf8/src/Patchwork/Utf8/Bootup.php:45
Stack trace:
#0 /customers/9/2/c/psychomusic.de/httpd.www/phpBB3/includes/utf/utf_tools.php(28): Patchwork\Utf8\Bootup::initMbstring()
#1 /customers/9/2/c/psychomusic.de/httpd.www/phpBB3/common.php(97): require('/customers/9/2/...')
#2 /customers/9/2/c/psychomusic.de/httpd.www/phpBB3/index.php(23): include('/customers/9/2/...')
#3 {main}
  thrown in /customers/9/2/c/psychomusic.de/httpd.www/phpBB3/vendor/patchwork/utf8/src/Patchwork/Utf8/Bootup.php on line 45