Firmware update problem – urgent

Hi, i’m getting this ERROR 0x1f after been running Firmware v3124 Updater. (similar situation with Williams who wrote Error code 0x1f Topic)
I’ve tried different methods and none is uploading firmware correctly. Has result firmware update fails and no firmware is running at the moment so i can’t either see the IP or build-in firmware version, but i’m pretty sure it was v2016 (or under).
Please help me to fix this situation.
I bought this new about 6 moths ago…. still want to use much more.
Thanks!