Doorbell not syncing with hub.

Hi, my doorbell won't sync with hub anymore.

I repositioned the bell and when I clicked it into the holder it was difficult to clip in. So it looks like I used too much force and the screw head that holds the bracket pressed hard against the workings inside the bell. I've tightened down the screw for clearance. Now the bell won't sync with the hub, it doesn't connect anymore. Does anyone know what part I've damaged and can it be repaired. I must have broken a connection inside. It charges ok and makes the ring sound when pressed, it just won't connect anymore. Please help.