T1600G-28TS Firmware upgrade failed
i have tried to upgrade my T1600G-28TS switch, but it won´t work.
Device Name: T1600G-28TS
Hardware Version: T1600G-28TS 3.0
Firmware Version: 3.0.0 Build 20180130 Rel.33015(s)
Boot Loader Version: TP-LINK BOOTUTIL(v1.0.0)
I´ve downloaded the newest firmware from https://www.tp-link.com/de/support/download/t1600g-28ts/#Firmware
In the log I will only get the message " Failed to upload the firmware file by xxxxx on web (192.168.x.xx)."
On the download page I see the only "T1600G-28TS(UN) V3.0" (I don´t know what the "(UN)" means, but didn´t got another result for my search)
Does somebody have an idea what I do wrong?