Mi Router 4C with WiFi range extender Pro 2

[mecanicodev]

I have a Mi Router 4C (model R4CM) and as a main router, I want to use WiFi range extender Pro 2, as a repeater, but I can't make it works, the extender is unable to add the device (router), this is odd because I successfully setup the extender with other brands router.

Any ideas about how I could fix this issue?