Fatal error: Uncaught Error: Undefined constant "Patchwork\Utf8\MB_OVERLOAD_STRING" in /home/httpd/vhosts/dbopp.ch/httpdocs/vendor/patchwork/utf8/src/Patchwork/Utf8/Bootup.php:45
Stack trace:
#0 /home/httpd/vhosts/dbopp.ch/httpdocs/vendor/patchwork/utf8/src/Patchwork/Utf8/Bootup.php(26): Patchwork\Utf8\Bootup::initMbstring()
#1 /home/httpd/vhosts/dbopp.ch/httpdocs/vendor/contao/core-bundle/src/Resources/functions/utf8_bootup.php(11): Patchwork\Utf8\Bootup::initAll()
#2 /home/httpd/vhosts/dbopp.ch/httpdocs/vendor/composer/autoload_real.php(69): require('/home/httpd/vho...')
#3 /home/httpd/vhosts/dbopp.ch/httpdocs/vendor/composer/autoload_real.php(59): composerRequiref84fda28f1d4b9e47fe6f33d03dcb901('51ac2c1f730ac97...', '/home/httpd/vho...')
#4 /home/httpd/vhosts/dbopp.ch/httpdocs/vendor/autoload.php(7): ComposerAutoloaderInitf84fda28f1d4b9e47fe6f33d03dcb901::getLoader()
#5 /home/httpd/vhosts/dbopp.ch/httpdocs/web/app.php(18): require('/home/httpd/vho...')
#6 {main}
  thrown in /home/httpd/vhosts/dbopp.ch/httpdocs/vendor/patchwork/utf8/src/Patchwork/Utf8/Bootup.php on line 45