I have a old version of LEDE installed on my TP-Link Archer C2 which I downloaded from here. The firmware version is LEDE Reboot 17.01.6 r3979-2252731af4 and the kernel version is 4.4.153.
OpenWrt 19.07 seems to be available for my router, so I downloaded the upgrade file and tried to flash it using LuCI. However, I got the following error:
The uploaded image file does not contain a supported format. Make sure that you choose the generic image format for your platform.
Am I doing something wrong?