If the app crashes when you try to launch it, we will first ask you to make sure your device is connected to the Internet and to try again. This should allow it to successfully launch.
Our team is aware of an issue impacting the Just Dance Now and Just Dance Controller applications for iOS 12 users on iPhone 5 / 5s / 6 / 6s. If you're not connected to the Internet, it is very likely that your application will crash on launch.
Our team is investigating this issue and is planning to deliver a fix for the upcoming update. We thank you for your patience while we're working on it.