Hi! For starters, check whether you have enough free space available on your phone and whether installation from unknown (non-Google Play) sources is allowed. If it still doesn't work then, you'll probably need to grab a log, as without it I'm not really able to say what's going on... (see https://android.gadgethacks.com/how-to/android-basics-capture-logcat-for-detaile... for more info). Good luck!