How to enable knox protection on j2 prime when it is responding unauthorized app has been installed

[Android Central Question]

when it is responding unauthorized app has been installed

 

[Rukbat]

Root the phone, then uninstall all the Knox apps. But if it's giving you that message, I suspect that the phone was set up to use Knox by your employer, and that would get you fired, so just don't install unauthorized apps - which could also get you fired. (Knox, as it comes, is just a kind of "stub" that allows you to download the whole Knox system.)