Fatal error: Uncaught Error: Class 'DOMDocument' not found in /srv/piwigo/web/include/emogrifier.class.php:406
Stack trace:
#0 /srv/piwigo/web/include/emogrifier.class.php(233): Emogrifier->createXmlDocument()
#1 /srv/piwigo/web/include/functions_mail.inc.php(955): Emogrifier->emogrify()
#2 /srv/piwigo/web/include/functions_mail.inc.php(853): move_css_to_body('<!DOCTYPE html ...')
#3 /srv/piwigo/web/include/functions_mail.inc.php(458): pwg_mail(Array, Array, Array)
#4 /srv/piwigo/web/admin/include/updates.class.php(206): pwg_mail_admins(Array, Array, false, true)
#5 /srv/piwigo/web/include/page_tail.php(48): updates->notify_piwigo_new_versions()
#6 /srv/piwigo/web/include/functions.inc.php(983): include('/srv/piwigo/web...')
#7 /srv/piwigo/web/include/functions_html.inc.php(284): redirect_html('identification....')
#8 /srv/piwigo/web/include/functions_category.inc.php(44): access_denied()
#9 /srv/piwigo/web/index.php(21): check_restrictions('51')
#10 {main}
thrown in /srv/piwigo/web/include/emogrifier.class.php on line 406