I just updated to the latest firmware … and using it as a repeater … I have access the admin screen… things seems working fine … but … if you click on anything … nothing happens … nothing is actionable … say I click on openVPN … nothing happens … device seems working fine as a repeater … but I can. not do anything in the admin screen …
Generally this is related to browser version. Make sure you use latest version of Chrome, Firefox or Safari. Edge also work.
Also try a private Tab.