I have installed "hi app lock" application 2 year ago. But rarely used it. Now when i open it, it doesn't open. So i decided to uninstall it, but first i have to revoke its administration rights. So i try to unchecked it, but that action is crashing. Attached image of uninstall steps. Please let me know how to remove this app. I don't want to factory reset or root my android device(oneplus one, OS: Cynogen OS version: 13.2.1....)
After viewing report's call stack, got to know that android.permission.SYSTEM_ALERT_WINDOW
for this app is not enabled. So, i enabled above setting by help of this link, https://www.experts-exchange.com/questions/28947878/How-to-enable-android-permission-SYSTEM-ALERT-WINDOW-in-marshmallow.html and then successfully revoke device administrator right and uninstalled it.