I need to be able to configure TL-MR3420 (EU) to Auto Reboot to specify a time when the router will reboot automatically.

I did do the steps given ( https://www.tp-link.com/ae/support/faq/1992/ ) but my router does not have " Auto reboot " option and as mentioned in TP-Link web support !!!! 

how can we activate this option ??  Is there a firmware that needs to be installed ? If yes, please provide me with the link . . . 

I did contact TP-Link ( Middle East ) technical support team, but they are slow and useless . . They told me to contact my ISP  :(