Possible soft brick when trying to revert to stock rom

Hello everyone!
Apologies in advance if I broke any forum rules by accident, first time posting here.
I have some experience with rooting galaxy devices as well as flashing roms and recovery, and have done this many times before, so I didnt put much thought in the firmware update process.
I decided to revert my S5 (SM-G900F) to its original stock firmware.
Before the failed attempt I was running Resurrection Remix 5.5.0 with TWRP recovery.
I simply went ahead and downloaded the last firmware released that is supported for my country (G900FXXU1BPA2_G900FOJK1BPA1_ILO) and proceeded with flashing it via ODIN and received the following log messages:

<ID:0/007> Added!!
<ID:0/007> Odin v.3 engine (ID:7)..
<ID:0/007> File analysis..
<ID:0/007> SetupConnection..
<ID:0/007> Initialzation..
<ID:0/007> Get PIT for mapping..
<ID:0/007> Firmware update start..
<ID:0/007> SingleDownload.
<ID:0/007> aboot.mbn
<ID:0/007> NAND Write Start!!
<ID:0/007> sbl1.mbn
<ID:0/007> rpm.mbn
<ID:0/007> tz.mbn
<ID:0/007> sdi.mbn
<ID:0/007> NON-HLOS.bin
<ID:0/007> boot.img
<ID:0/007> recovery.img
<ID:0/007> system.img.ext4
<ID:0/007> modem.bin
<ID:0/007> cache.img.ext4
<ID:0/007> hidden.img.ext4
<ID:0/007> FAIL! (Size)
<ID:0/007>
<ID:0/007> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)

Currently the device is stuck during the boot process (most likely still in download mode) with the following message displayed on the screen:
Firmware upgrade encountered an issue. Please select recovery mode in Kies and try again.

Kies does not seem to able to recognize the device at all.
It is worth mentioning that I have the original ROM files on the internal SD card, as well as an external SD card if needed for troubleshooting.

I would really appreciate if you can help me with this, I really hope that what I done so far is reversible.

Thanks in advance!

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