Oh okay got it ! thanks buddy. My bad XD
It's .zip only dude !!
I'm on OnePlus 6 beta 35. I've downloaded the latest 10.3.5 using Oxygen Updater, but when I try to install it using local upgrade, a message pops up...
Shot using OnePlus 6.
Shot in Pune during Ganeshotsava.
I believe they've rolled the update for everyone !
in two minutes