Mpdf\MpdfException: mbstring extension with mbregex support must be loaded in order to run mPDF. in /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/vendor/mpdf/mpdf/src/Mpdf.php:9708
Stack trace:
#0 /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/vendor/mpdf/mpdf/src/Mpdf.php(1051): Mpdf\Mpdf->_dochecks()
#1 /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/src/Service/DfxNfxFunctions.php(93): Mpdf\Mpdf->__construct()
#2 /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/src/Controller/DfxKalenderController.php(1618): App\Service\DfxNfxFunctions->writePdf()
#3 /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/vendor/symfony/http-kernel/HttpKernel.php(163): App\Controller\DfxKalenderController->pdfAction()
#4 /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/vendor/symfony/http-kernel/HttpKernel.php(75): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#5 /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/vendor/symfony/http-kernel/Kernel.php(202): Symfony\Component\HttpKernel\HttpKernel->handle()
#6 /var/www/chroot/datefix/sftp/datefix.hausderwissenschaft.org/web/index.php(23): Symfony\Component\HttpKernel\Kernel->handle()
#7 {main}