What is KingoRoot error code 0x15F6D5?

I'm currently rooting a Samsung J1 Ace in Android 5.1.1 using KingoRoot in order to give [Link2SD](https://play.google.com/store/apps/details?id=com.buak.Link2SD) root access and move the apps, music, and other data files from its internal storage to a SD card. The internal hard drive has 8 GB and is almost full to the point where it can't update apps. I've downloaded KingoRoot through the mobile browser as an **APK file** and enabled USB debugging. After a few minutes, it reports that the rooting process has failed and reports ERROR CODE: 0x15F6D5. I searched through forums and have found nothing on this error code. What is it and how do I avoid it?