New Smart Meter

Hi, we had a new smart meter fitted yesterday and everything was working ok when the engineer demonstrated it but today for some reason when we press the ‘NOW’ or ‘FUEL’ buttons it does not switch between gas and electric. Gas is showing ok but electric does not come up on either the now button or fuel button. Have tried the usual turning it off and on again but that didn’t work. Any ideas please? Thanks Richard

Thank you norman7115.