I am trying to re-flash(not Upgrade) OpenWrt via LuCI WebGUI but i am getting
The uploaded image file does not contain a supported format. Make sure that you choose the generic image format for your platform. How can i fix this error ?. Should i follow this Guide. I would like to get the .trx file from openwrt instead of converting,to be on the safe side after all i only have one router.
TP-Link Archer C20 AC750