Board Thread:Love Live! School Idol Festival Lounge/@comment-31604062-20170326123141/@comment-11148831-20170326143538

Solution 1: Try restarting the device before trying to open the app again, if you haven't already.

Solution 2: Clear other opened apps before running the SIF.

Solution 3: If you update through apks, try re-installing the latest apk.

Solution 4: Re-install app── which you said you can't do, so.. check Solution 5.

Solution 5: Message kLab JP about your problem.