Template printing error after update

[spanky]

at the time I followed this guide,
worked perfectly, not anymore

Templates grouped by group

I would like to create a template with these features: instead of elencarmi all products with quantities 1 coca 3.00 2 fanta 6.00 3 beer 9.00 1 appetizer fish 1.00 1 appetizer meat 1.00 1 Second meat 1.00 they should be grouped by group 6 drinks 18.00 2 appertizer 2.00 1 second 1.00 I tried with groups but I can not does anyone know how to do? thanks