sometimes you/your athlete just has this mental brain fart thing.
that usually means that the nervous system is approaching overload or has overloaded.
one thing you can do to give you some space, or some working room, is something so far away from lifting.
talk about or do something that forces the athlete to engage and think but about something that is very much not weightlifting.
so in this case movies. what is your favorite movie? other questions i like are - where are you from? what is your favorite food? who is your favorite actor? where do you get good tacos/bbq/sushi around here? things like that.
coaches play with that little life hack. see how far it takes you.