<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function PHPMailer\PHPMailer\mail() in /home/c1620306/public_html/wp-includes/PHPMailer/PHPMailer.php:880
Stack trace:
#0 /home/c1620306/public_html/wp-includes/PHPMailer/PHPMailer.php(1968): PHPMailer\PHPMailer\PHPMailer-&gt;mailPassthru('no-reply@c16203...', '=?us-ascii?Q?[e...', '=0A&lt;!DOCTYPE ht...', 'Date: Fri, 13 D...', NULL)
#1 /home/c1620306/public_html/wp-includes/PHPMailer/PHPMailer.php(1691): PHPMailer\PHPMailer\PHPMailer-&gt;mailSend('Date: Fri, 13 D...', '=0A&lt;!DOCTYPE ht...')
#2 /home/c1620306/public_html/wp-includes/PHPMailer/PHPMailer.php(1523): PHPMailer\PHPMailer\PHPMailer-&gt;postSend()
#3 /home/c1620306/public_html/wp-includes/pluggable.php(546): PHPMailer\PHPMailer\PHPMailer-&gt;send()
#4 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-mail.php(727): wp_mail(Array, '[espiga.com.ar]...', '\n&lt;!DOCTYPE html...', Array, Array)
#5 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/modules/notification-center/class-notification-center.php(532): ITSEC_Mail-&gt;send()
#6 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/modules/site-scanner/mail.php(24): ITSEC_Notification_Center-&gt;send('malware-schedul...', Object(ITSEC_Mail))
#7 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/modules/malware-scheduling/class-itsec-malware-scheduling-scanner.php(73): ITSEC_Site_Scanner_Mail::send(Object(iThemesSecurity\Site_Scanner\Scan))
#8 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/modules/malware-scheduling/class-itsec-malware-scheduling-scanner.php(31): ITSEC_Malware_Scheduling_Scanner::send_email(Object(iThemesSecurity\Site_Scanner\Scan))
#9 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/modules/malware-scheduling/class-itsec-malware-scheduling.php(29): ITSEC_Malware_Scheduling_Scanner::scan()
#10 /home/c1620306/public_html/wp-includes/class-wp-hook.php(324): ITSEC_Malware_Scheduling-&gt;run_scan(Object(ITSEC_Job))
#11 /home/c1620306/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters('', Array)
#12 /home/c1620306/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action(Array)
#13 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler.php(383): do_action('itsec_scheduled...', Object(ITSEC_Job))
#14 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler-page-load.php(261): ITSEC_Scheduler-&gt;call_action(Object(ITSEC_Job))
#15 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler-page-load.php(233): ITSEC_Scheduler_Page_Load-&gt;run_recurring_event('malware-scan')
#16 /home/c1620306/public_html/wp-content/plugins/ithemes-security-pro/core/lib/class-itsec-scheduler-page-load.php(184): ITSEC_Scheduler_Page_Load-&gt;run_due_now()
#17 /home/c1620306/public_html/wp-includes/class-wp-hook.php(324): ITSEC_Scheduler_Page_Load-&gt;init('')
#18 /home/c1620306/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters(NULL, Array)
#19 /home/c1620306/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action(Array)
#20 /home/c1620306/public_html/wp-settings.php(704): do_action('init')
#21 /home/c1620306/public_html/wp-config.php(116): require_once('/home/c1620306/...')
#22 /home/c1620306/public_html/wp-load.php(50): require_once('/home/c1620306/...')
#23 /home/c1620306/public_html/wp-blog-header.php(13): require_once('/home/c1620306/...')
#24 /home/c1620306/public_html/index.php(17): require('/home/c1620306/...')
#25 {main}
  thrown in <b>/home/c1620306/public_html/wp-includes/PHPMailer/PHPMailer.php</b> on line <b>880</b><br />