Email SMTP setup issue

Good day FlinkISO team, thank you for maintaining this forum to provide support for the software.

I followed all the installation setup instructions at https://www.flinkiso.com/manual/installation.html but the email SMTP is not working. 
My email.php configuration is the following:
class EmailConfig {

       public $default = array(
               "transport" => "Mail",
               "from" => array("[email protected]" => "FlinkISO"),
               //"charset" => "utf-8",
               //"headerCharset" => "utf-8",
       );

       public $smtp = array(

               "transport" => "Smtp",
               "from" => array("[email protected]" => "FlinkISO"),
               "host" => "mail.picengineering.com.my",
               "port" => 465,
               "timeout" => 30,
               "username" => "[email protected]",
               "password" => "******",
               "client" => null,
               "log" => true,
               "tls" => true,
       );

       public $fast = array(
               "from" => "[email protected]",
               "sender" => null,
               "to" => null,
               "cc" => null,
               "bcc" => null,
               "replyTo" => null,
               "readReceipt" => null,
               "returnPath" => null,
               "messageId" => true,
               "subject" => null,
               "message" => null,
               "headers" => null,
               "viewRender" => null,
               "template" => false,
               "layout" => false,
               "viewVars" => null,
               "attachments" => null,
               "emailFormat" => null,
               "transport" => "Smtp",
               "host" => "mail.picengineering.com.my",
               "port" => 465,
               "timeout" => 30,
               "username" => "[email protected]",
               "password" => "*******",
               "client" => null,
               "log" => true,
               "tls" => true,
               //"charset" => "utf-8",
               //"headerCharset" => "utf-8",
       );
}

The error message I received from the “Add SMTP Email” webpage is:
SocketException: SMTP timeout. in /var/www/html/flinkiso/lib/Cake/Network/Email/SmtpTransport.php:362
Stack trace:
#0 /var/www/html/flinkiso/lib/Cake/Network/Email/SmtpTransport.php(149): SmtpTransport->_smtpSend()
#1 /var/www/html/flinkiso/lib/Cake/Network/Email/SmtpTransport.php(86): SmtpTransport->_connect()
#2 /var/www/html/flinkiso/lib/Cake/Network/Email/CakeEmail.php(1183): SmtpTransport->send()
#3 /var/www/html/flinkiso/app/Controller/SettingsController.php(165): CakeEmail->send()
#4 [internal function]: SettingsController->smtp_details()
#5 /var/www/html/flinkiso/lib/Cake/Controller/Controller.php(500): ReflectionMethod->invokeArgs()
#6 /var/www/html/flinkiso/lib/Cake/Routing/Dispatcher.php(193): Controller->invokeAction()
#7 /var/www/html/flinkiso/lib/Cake/Routing/Dispatcher.php(167): Dispatcher->_invoke()
#8 /var/www/html/flinkiso/app/webroot/index.php(115): Dispatcher->dispatch()
#9 {main}  

Somehow, my tmp/logs/error.log file is completely empty despite receiving the error code above.
My email server is set to SSL/TLS on port 465.