This is a poorly designed app. Upon opening the app, there is a button that suggests downloading the app. I am not able to access my rewards. I followed blaze's recommendation of logging out and back in. Now I can't even log into my account that I literally just signed out of. Based on the tweets I'm seeing, tons of people are having the same problem with the app. There app clearly cannot handle any sort of significant volume. Time for a new app developer or something.