Does anyone know where to get the firmware (Oreo) for Samsung galaxy S8 SM-G950F zip file to flash with TWRP?
Then just look up your model number or u can also try xda forums. Just type twrp for android 8.0 (then your model # ) then xda
It would probably be much easier to use Odin to go back to pure stock firmware. Especially since it’s very easy to go ahead and root it again by flashing CF Root with Odin.