The issue is a bug in the app and they are working on it. I guess you could ask them what Android OS works. I have a few other Android devices here so if you must have this, they should tell you what it runs on.
"Screen overlay Detected
To change this permission setting, you first have to turn off
the screen overlay from Settings>Apps" . Yes, that is the one
I got a refund so i could not use it again. I went to that settings and clicked on "Draw over other apps"...but now that i do not have that app any longer, don't know how i can replicate the error. I read elsewhere that this is an Android problem and they are supposingly working on a fix. Many members are coming across this problem.