Hi @words,

I'm not a TP-Link employee, but the latest firmware is ER605(UN)_V2_2.2.6 Build 20240718.  The same version is on the global site and the us site; the various sites can lag with the updates so never hurts to check global and/or your region.  The forum is not where I usually go to search for firmware unless I'm interestd in the "early release" (not officially supported) version, but here's the "How to..." on that.

Regarding EOL for the er605v2 see: https://community.tp-link.com/en/business/forum/topic/695878

  @D-C thanks for the reply, ok I thought there may be some newer FW as that is from July.
 

In any case, I'm trying to upgrade my v2 from 2.2.4 Build 20240119 Rel.44368 and it's giving me an error 

"Upgrade Failed. Please check the upgrade file and try again."

Tried to download the file several times, there are no errors  unzipping, etc.

@Clive_A can you please assist.

TY

  @words 

When you upgrade FW it's important to choose proper REGION on download page that matches your Gateway's region.

If you are not sure which region is proper for your device, go with GLOBAL region's version.

If you still have a problem (even with GLOBAL update), try to go version by version upgrade. Since you are on 2.2.4 now, try to upgrade to 2.2.5 first:

https://community.tp-link.com/en/business/forum/topic/672252

And then to 2.2.6.

Cheers