Fatal error: Uncaught Error: Call to undefined function PHPMailer\PHPMailer\filter_var() in /usr/local/www/apache24/vdh/include/phpmailer/PHPMailer.php:1432
Stack trace:
#0 /usr/local/www/apache24/vdh/include/phpmailer/PHPMailer.php(1171): PHPMailer\PHPMailer\PHPMailer::validateAddress()
#1 [internal function]: PHPMailer\PHPMailer\PHPMailer->addAnAddress()
#2 /usr/local/www/apache24/vdh/include/phpmailer/PHPMailer.php(1124): call_user_func_array()
#3 /usr/local/www/apache24/vdh/include/phpmailer/PHPMailer.php(1014): PHPMailer\PHPMailer\PHPMailer->addOrEnqueueAnAddress()
#4 /usr/local/www/apache24/vdh/include/functions_mail.inc.php(636): PHPMailer\PHPMailer\PHPMailer->addAddress()
#5 /usr/local/www/apache24/vdh/include/functions_mail.inc.php(478): pwg_mail()
#6 /usr/local/www/apache24/vdh/admin/include/updates.class.php(202): pwg_mail_admins()
#7 /usr/local/www/apache24/vdh/include/page_tail.php(48): updates->notify_piwigo_new_versions()
#8 /usr/local/www/apache24/vdh/identification.php(129): include('...')
#9 {main}
thrown in /usr/local/www/apache24/vdh/include/phpmailer/PHPMailer.php on line 1432