I have tried various versions of Odin, including an older Odin3 on a Windows PC, but none succeed. This leads me to believe that I have not properly or fully unlocked the device, but I am not certain. Reading on some /e/ forums, a suggestion is that KG STATUS : PRENORMAL may be an issue? Below is a pic of the information I have in my DL mode.
I don’t know what solved this issue, but I did two things and when I checked KG STATUS after these, the flash was possible:
I relocked the bootloader, and then unlocked it again
I inserted a SIM card (I have the LTE model of this device) and registered on the network.
As I say, after these two operations, which I carried out as a way of trying to change this KG STATUS to show something different to PRENORMAL (as seen in the photograph of the Download Mode), something happened, and the status changed to CHECKING.
I was then able to flash the vbmeta.tar, recovery.tar and eventually the iodé rom itself.
My S5e is running iodé 5.1 and it works like a dream! Thanks all and thanks IODÉ