Can't install stock firmware on TP-LINK Archer A6 v2 (EU)

Hello, after installing this custom OpenWrt from I can't go back to
the original firmware. I tried installing the original firmware through TFTP, but sadly no success, only one power led is on, and no connection. But if I try to install the custom OpenWrt through TFTP, it successfully installs and there is a connection. Also tried to install the original firmware through WinSCP+Putty, but with no success.

Did you contact u/zero_overload_25 on reddit?

That's who built the custom firmware.