Fatal error: Uncaught Error: Class "DOMDocument" not found in /var/www/html/photos/include/emogrifier.class.php:406 Stack trace: #0 /var/www/html/photos/include/emogrifier.class.php(233): Emogrifier->createXmlDocument() #1 /var/www/html/photos/include/functions_mail.inc.php(951): Emogrifier->emogrify() #2 /var/www/html/photos/include/functions_mail.inc.php(849): move_css_to_body() #3 /var/www/html/photos/include/functions_mail.inc.php(459): pwg_mail() #4 /var/www/html/photos/admin/include/updates.class.php(202): pwg_mail_admins() #5 /var/www/html/photos/include/page_tail.php(48): updates->notify_piwigo_new_versions() #6 /var/www/html/photos/include/functions.inc.php(1012): include('...') #7 /var/www/html/photos/include/functions_html.inc.php(284): redirect_html() #8 /var/www/html/photos/include/functions_category.inc.php(44): access_denied() #9 /var/www/html/photos/index.php(21): check_restrictions() #10 {main} thrown in /var/www/html/photos/include/emogrifier.class.php on line 406