Motion Sensor Spoken Alert not working

I have a hardwired Ring Video Pro Doorbell, with a set up motion field. I am unable to get the doorbell to announce 'Hi, you are currently being recorded' when the motion sensor is triggered. I have followed the set up guidance, ( [Motion Warning Information – Ring Help](https://support.ring.com/hc/en-gb/articles/360048674751-Motion-Warning-Information?fbclid=IwAR0Dv7HyR4N-cC_X8qI-ZFlR8zWyGaJCUMK1YUXJ5MKRNHRNm72IatEKk7k) ) when I toggle the motion warning switch to 'on' it says that it is enabled; but still no spoken alert from the doorbell. It should work in the UK and on my version of Doorbell according to Ring.com : has anyone else had the same issue and know how to correct it please?