preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead(1497)

#0 [internal function]: error::error_handler(8192, 'preg_replace():...', '/home/refricent...', 1497, Array)
#1 /home/refricentrocurit/public_html/system/util/phpmailer/phpmailer_lite.class.php(1497): preg_replace('/([\\000-\\011\\01...', ''='.sprintf('%0...', '[Erro no Sistem...')
#2 /home/refricentrocurit/public_html/system/util/phpmailer/phpmailer_lite.class.php(1327): phpmailer_lite->EncodeQ('[Erro no Sistem...', 'text')
#3 /home/refricentrocurit/public_html/system/util/phpmailer/phpmailer_lite.class.php(596): phpmailer_lite->EncodeHeader('[Erro no Sistem...')
#4 /home/refricentrocurit/public_html/system/util/phpmailer/phpmailer_lite.class.php(496): phpmailer_lite->MailSend('Date: Thu, 1 Oc...', '--b1_5e14da691e...')
#5 /home/refricentrocurit/public_html/system/module/wxmail.class.php(169): phpmailer_lite->Send()
#6 /home/refricentrocurit/public_html/system/sys.error/error.class.php(419): wxmail->send()
#7 /home/refricentrocurit/public_html/system/sys.error/error.class.php(97): error::sendError(8192, 'Declaration of ...', '/home/refricent...', 0, NULL)
#8 [internal function]: error::exception_handler(Object(ErrorException))
#9 {main}

[Exception]
Declaration of wxform2::ajaxRequest() should be compatible with wxapp::ajaxRequest(array $post, array $get)
/home/refricentrocurit/public_html/system/app/wxform2/wxform2.class.php(0)

[BACKTRACE]
/home/refricentrocurit/public_html/system/autoload.php (85)/home/refricentrocurit/public_html/system/wxapp.class.php (139)/home/refricentrocurit/public_html/index.php (144)