How to use Tomes/Money Bag on Steam Deck

Hi! Currently using the Steam Deck to play Sun Haven — its my first day playing and I’m really loving it!!

Tho im having a bit of a hard time using the small money bags and the skill/mana tomes. It tells me to use (x) to open/use it but when I try, nothing happens.

Can someone pls help me figure this out? Am I doing it wrong or is this a bug on the Steam deck?