My Coffee Card app not working on my new Samsung Galaxy S6

[AC Question]

I had the My Coffee Card app on my Motorola Atrix, no problems. I have installed it on my new Samsung Galaxy S6 and it won't work. Is there any information on compatibility out there? I can log into my Starbucks account on any other device. Logging is through the app on the S6 is not allowed. Payment barcode is not displayed either.