@Steph_L It's EoL on the US portal. Here are the Load Balancing Routers.

@ZaliousPrime Access Control in Archer Series has been redesigned and it's for whitelisting or blacklisting devices connecting to your router. The guide you've posted is for entry level devices : If...

@Yal Use Mozilla or Chrome browsers to see if any difference. You can also install the Tether app on your mobile and configure the router through this app.

@Yal Are you managing your router from your LAN or you're using a Remote Management ? Some of the router's menu items may not be visible if you're using a remote management. What's your network...

@D0bros TL-WR740N is not Tether app manageable device - see the full list of Tether compatible devices here. You have to open the web management interface of the router in your web browser to upgrade...

@Yal In which mode you're using the device - wireless router or AP ? Have you tried to use a different web browser to open the device's management page ? (Mozilla, Chrome), use incognito tab if...