@HELP_ER605 maybe you can find what you are looking for over here: https://www.tp-link.com/en/support/faq/3562/ edt: created the link

I just upgraded my OC200 to: 5.15.20.381.35.5 Build 20250326 Rel.41966 And tried a firmware update on the ES205G from 1.0.3 to 1.0.3 and it seems to work.

GRL wrote @RBL I have 2 ES205G units on local network. Both updated in omada without any issues at all. However, other users have reported the same problems that you have with the same model, the fix...

MR.S wrote @RBL What happens if you try to install 1.0.1 then? You can install it even if it's the same one you have to test if you get the same error. @MR.S tried it as well. Same issue.

MR.S wrote @RBL It's not exactly the same, my switch got 1.0.2 so not exactly the same firmware, maybe there's a bug in the version you're trying. @MR.S Might be the case, as I have not found a 1.0.2...

@MR.S It is a local site and all switches are indeed on the same network as the controller.