I had arched c7 v5 and bought re450 v4 to setup one mesh.

Connected re450 v4 to archer c7 with cable.

In Tether App I can see both devices also I can see them in webpages.

Archer C7 is in Router mode.

Onemesh slider was enabled on Archer c7

I could see re450 one time in onemesh page, but attempt to add was always failed.

reset re450.

Now I cannot see it anymore in onemesh page or router

On re450 onemesh page it say router is not supported

Do I have to send it back to seller?