If it's 0.6.0, then it's probably fixed in 0.6.1
But you will have to restart from the point, where this bug didn't occur yet
I profoundly appreciate the response. It is in version 0.5.1. I thought it was the frames and I adjusted them from 30 to their limit and nothing worked. It doesn't freeze, the gym staff keeps moving but it doesn't give the option to buy again. I hope the game has many updates and content, I had fun and sometimes felt excitement for Sarah, it’s strange but good.