Interface load cell with grove base shield and grove ADC HX711 amplifier

Hi all,
I would like to use a load cell with arduino uno. For the connection of the load cell to arduino uno I bought a grove base shield and a grove HX711 amplifier. I have connected the load cell to the amplifier and the amplifier to the base shield on D4. However, I can’t measure anything. Do you have any tips on what should be the connection?
thanks
Santos