Retail store- no sims buying

I have a retail store. Have advertisement and signs and decoration. Never used to be a problem and recently, I get the 1 or 2 sale and then no one will buy anything. I will do all the Interactions with a sim and then all of a sudden it will cancel and they just leave. I had a sim say they are ready to purchase. I go to do the action then they just leave. Is this a known bug? Is there something I can do to fix it. I am just losing money. 

I play on Xbox