1.  Access Safe Mode

If you want to access Safe Mode, power down your phone completely — hold the power button, then select Power off from the menu. Once the phone is off, press and hold the power button to turn the phone on, and as soon as the “Samsung” logo pops on screen, release the power button and then press and hold the volume down button until the phone boots up completely.

2.  Reset all apps to Default Settings

Go to Apps, Settings, then Applications Manager, if you don’t see it, add it and Applications, them More, choose from drop down: Reset app preferences, this will turn the App off.  (you are looking for an app that is weird like Porn)

3.  Turn Security Off

Go to Apps, Settings, Lock Screen and Security, Other Security Settings, Device Administrators, find the Icon for the App and turn it off.  Then go back and uninstall the App, it was grayed out, it will allow the uninstall now.

4.  Restart Everything is fine now