SYSTEM_ALERT_WINDOW PERMISSION on API 26 not working as expected. Permission denied for window type 2002

Question

I am using overlay permission to display certain information in my app. Running it on API 23 - 25 it works fine (asking for permission, granting, etc. according to

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Answer 1

if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
WindowManager.LayoutParams.TYPE_SYSTEM_ERROR
}
else
{
WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY
}

only change in this parameter of Window manager