Index S2 does not recognize me

I have had the scale for a couple of years now 

but when I started using it after an absence it no longer recognises me as the owner or any guests and it only shows weight info.

i have read all other threads and none offer resolution for this issue. 

i have reset,  there is comms on phone to app via blue tooth and Wi-Fi network I feel the issue is between the scale and the app 

anyone?