I am having this same issue on an S9+. I can’t get TWRP to flash because I am getting the same error (both via easy installer and via USB cable). Debugging is allowed and OEM unlock is enabled. I am at a loss.
I am having this same issue on an S9+. I can’t get TWRP to flash because I am getting the same error (both via easy installer and via USB cable). Debugging is allowed and OEM unlock is enabled. I am at a loss.