Router ER605 firmware upgrade failed with error "invalid file"
I tried several times to upgrade the ER605 (European version) from v2.1.1 to v2.1.2 always with the error message "Upgrading Router-ER605 failed because the upgrade file is invalid. Please select the correct file.". See attached picture
I started upgrading the "standard" way via the omada sw controller. After that I downloaded the file from the TP-Link support site and tried it manually with ER605(UN)_v2_2.1.2 Build20230210. After that with ER605(UN)_v2_2.1.1 Build 20230115 and I tried to downgrade to ER605(UN)_v2_2.0.1 Build 20220223 always without success and the same error message.
I rebooted the router via omada sw controller and via power off/on. No difference, I always end up with the error message that the file is invalid.
Any idea what I can try to solve this issue? Maybe to delete an old file or data entry somewhere?
Or do I have to do a firmware reset on the router?
Any advice is welcome
Andy
PS: an earlier upgrade from v2.0.1 to v2.1.1 worked without problems