Deleted S7 G930F OS

[AC Question]

I use TWRP and had rooted my S7, however after getting it repaired it was constantly rebooting and getting stuck in bootloop, so I used TWRP to wipe ALL partitions under 'Advanced wipe.' Now, I can only access download mode, and recovery, but when I try to flash software using Odin, it stays on NAND writing message in Odin, and there is never any change on the phone's download screen. I am trying to solve this issue. Can you please give me any advice?