6.2.4, mi3 no problem with mi band. It's probably something wrong with your band
Try to update mi fit to latest Chinese version. That will probably update firmware on mi band and maybe solves your problem.
Sent from my MI 3W using Tapatalk
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.vending/com.google.android.finsky.activities.AppCrashProxy}: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.APP_ERROR flg=0x10000000...