So I have an old SM-G920W8 that was with Rogers, but when I turned it on it would get stuck on the galaxy s6 screen. So I tried entering the recovery thing or whatever it was called but there was text at the top left that said "recovery is not seandroid enforcing", so then I tried to flash the stock firmware back on with Odin 3.10.6 with the ROM I got from Frija, but it fails every time.