Fatal error: Uncaught Error: Call to undefined function PHPMailer\PHPMailer\mail() in /var/www/photos/htdocs/public/piwigo/include/phpmailer/PHPMailer.php:874
Stack trace:
#0 /var/www/photos/htdocs/public/piwigo/include/phpmailer/PHPMailer.php(1959): PHPMailer\PHPMailer\PHPMailer->mailPassthru('piwigo_admin <a...', '=?UTF-8?Q?Piwig...', '--b1=_bC0agRpkB...', 'Date: Thu, 19 S...', NULL)
#1 /var/www/photos/htdocs/public/piwigo/include/phpmailer/PHPMailer.php(1680): PHPMailer\PHPMailer\PHPMailer->mailSend('Date: Thu, 19 S...', '--b1=_bC0agRpkB...')
#2 /var/www/photos/htdocs/public/piwigo/include/phpmailer/PHPMailer.php(1516): PHPMailer\PHPMailer\PHPMailer->postSend()
#3 /var/www/photos/htdocs/public/piwigo/include/functions_mail.inc.php(920): PHPMailer\PHPMailer\PHPMailer->send()
#4 /var/www/photos/htdocs/public/piwigo/include/functions_mail.inc.php(478): pwg_mail(Array, Array, Array)
#5 /var/www/photos/htdocs/public/piwigo/admin/include/updates.class.php(202): pwg_mail_admins(Array, Array, false, true)
#6 /var/www/photos/htdocs/public/piwigo/include/page_tail.php(48): updates->notify_piwigo_new_versions()
#7 /var/www/photos/htdocs/public/piwigo/index.php(723): include('/var/www/photos...')
#8 {main}
thrown in /var/www/photos/htdocs/public/piwigo/include/phpmailer/PHPMailer.php on line 874