My device (maybe) doesn't support Multiple Users. I have a rooted device with Xposed Framework installed.
I installed an app from the Play Store (I think it's named as "Multi Users", or other similar to that ...), grant that app a root access, and enable that feature. Then, I go to "Settings", and the "Users" Option was there. I add another account, and when it opened a Dialog Box telling me to setup that account now, I rebooted my phone because it was too slow ...
Now, when the phone had finished rebooting, my apps are gone (I mean, when I try to open them, they keep telling me
Application not installed); as well as my third party launchers, lockers, clocks, etc.
Previously, I had done this before (but with a different app), and it gives me options on the Lock Screen to switch to Users. But, this app doesn't have that option.
Also, the "Users" options is now hidden / not displayed on the Settings.
I also downloaded the ".apk" file of Root Browser (I already downloaded ES File Explorer, but cannot launch it due to that "Application not installed"), but it won't let me install either.
Will adb fix this? - I hope so ...
My device is running Samsung Galaxy Core Prime - Android 4.4 (Kitkat) with Root and Xposed Framework installed.