Why won't my DECO X20 V3 upgrade from 1.1.7 to 1.2.0?
I'm trying to update my Deco X20's from 1.1.7 Build 20240101 Rel. 64163 to version 1.2.0,
downloaded from https://www.tp-link.com/nl/support/download/deco-x20/v3/#Firmware
file "X20 3.0_en_1.2.0 Build 20240606 Rel. 64638_US_EU_JP_B4_EG_SE_up.bin"
But after uploading it through the web interface it says:
"Upgrade failed. Please select the latest version of firmware to upgrade."
Trying "Online Upgrade - Upgrade firmware over the internet. (button Check for upgrades)" in the device web interface or "Update Deco" in the app will not find the newer version (which obviously is available) either.
Auto Update is enabled.
I've also tried 1.2.1 (file "X20 3.0_en_1.2.1 Build 20240723 Rel. 64983_US_EU_JP_B4_EG_SE_up.bin")
Why will the firmware not update to the almost 6 months newer version, automatically or manually?
I'm in the Netherlands. I operate the Deco's in English.