Mobile order causes it to crash and never start again

I used this app for the deals, and it worked great.

When mobile ordering came up, I was excited as it would make ordering much easier than a drive-thru speaker. The order goes in fine, but after arriving at the restaurant, it crashed and could never restart. I am now far away from the restaurant and it still will not start, even after a reboot of my phone!

The manager told me that when you get within 100 yards of the restaurant, the order pops up on their screens and you are supposed to tell the app how you want to pick it up. I guess that part is broken

Mediaslayer about McDonald's, v5.5.1