Keeps crashing!

I love this app so much the stories are epic! I just got enough money to buy a bodyguard but when I updated it whenever I try and purchase something it keeps on crashing:-( I love this and my purchased stories Im starting to memorize the lines from because I cant purchase any others-PLEASE FIX ASAP!!!!!!!!!!!!!!!!!

Crazy for Chaplin! about My Sweet Bodyguard, v1.4