"Meine Mutter schneidet gerne Obst."
Übersetzung:My mother likes to cut fruit.
The more common plural of fruit is simply "fruit."
"Fruits" is usually used to mean multiple kinds of fruit, and not just multiple pieces of fruit. It's not a very common word and I wouldn't use it in this context.
Twice the option 'My mother likes to cut fruit.' is displayed and ticking both gives an error...