Can't find Hue Connect Smart App

So how do i fix the terrible performance of the smart lighting smartapp? I want my spots to all turn on and off together like they do in the hue app. I have just fitted some ST motion sensors and right now I wish I had bought the hue ones instead.

I am having problems discovering my hue bridge in ST app after removing it due to a renaming issue with my hue bulbs. I have went as far as wiping the ST Hub, the Hue Bridge, and my wireless router and the ST Hub still can’t discover the Hue Bridge. Also I get an error while searching for the hub.

please help! Thanks!