do you successfully flashed FW with Odin? when I encountered this issue. Odin always failI have the same issue but mine is hopeless case. My phone always display that dreaded error message when I try to open my phone. I tried using Odin to flash the stock versions but when it tries to restart, it shows the message again. Stuck at it. 7days passed still got the same issue.
My solution is
1. Use Odin version v3.12.7
2. Go to download mode
3. As you flash BL (flash BL only), press volume down + bixby + power. Odin will show Failed message (it's OK)
4. you phone will reboot to download mode
5. Close odin and open Odin v.3.13.1
6. Flash FW with no errors