So, I have a 4.2.2-32gb N7 WiFi only, running Paranoid Android 3.56, with a 3.1.10 franco-kernel. I downloaded an apk, f-droid to be exact onto my N7. I open it and try to install and the install button won't let me push it. The cancel button will let me push it,but no joy on the install button. I rebooted, wiped my cache, I have 3rd party apps allowed. I have tried installing by directly opening the apk and also by using some install apps from the play store. Any ideas?