Originally Posted by teo_simon
Ok I subsequently found the problem. It's due a software screen filter that I have on. Once I disabled it everything works fine. Weird but it works
Hahah, I know exactly what you're talking about. I had the same issue on my Galaxy Note. I noticed that it wouldn't install unknown APK every time I lay in bed at night, until I switched off the filter and then it worked.
Just imagine how many people have had or are having issues with this right now
Sent from my Z Ultra