Hue bridge doesnt connect to the app

I need some help, even the Hue support guy couldnt hel after 1 hour of tries.
My hue bridge doesnt want to connect to the app, tried in IOS and Android. The app finds the bridge and then asks for pressing the button to set it up and then lost connection, the app says no hue bridge found.
I am able to control the lights through smartthings, alexa, and even through the Hue dimmers but cant connect to the Hue app.
any ideas?