Starbucks' app is down on the first day of the chain's holiday menu

Starbucks' mobile app appeared to be down during the morning coffee rush on Thursday.Some users got a message saying, "mobile ordering is currently unavailable."The app has been a source of growth but has led to operational challenges for the chain's employees. Sign up to get the inside scoop on today’s biggest stories in markets, tech, and business — delivered daily. Read preview Thanks for signing up! Go to newsletter preferences Thanks for signing up! Access your favorite topics in a personaliz ...