Anyone got any idea how I can add the rest of my KE100s?

I have the KE100 kit, I added the hub to the Kasa App, then added the included KE100,  I had also purchased 3 more KE100s, I add another all good (2 now in total).

Then I opened the Kasa app to add the 3rd KE100, I now get "Couldn't add device" (see below).

Like I said I've added the KH100 hub, but it has been moved to Tapo for some reason.  When I first added it, it appeared in both Kasa and Tapo, but now only Tapo, please help I've tried TP-Link technical support but got an AI Bot reply (I used "AI" loosely as it is not AI but a LLM, but everyone seems to be jumping on the AI bandwaggon "all that is need for AI is and "IF" statement in the code PMSL )