why i can't flash oreo update though odin ?

[Mhmad Hany]

i can't flash a firmware Oreo update through Odin i lave the latest version 1.13.1 when i start flashing it say's fail like every time please help......

 

[r3xx3r]

i can't flash a firmware Oreo update through Odin i lave the latest version 1.13.1 when i start flashing it say's fail like every time please help......

what is the exact error message?