How can I fix a wifi issue on my Samsung S4 mini?

[AC Question]

samsung s4 mini wifi issue

Ok, so I've got a Samsung S4 mini GT-i9195 and It's rooted. The issue began when I updated the Android through Kies. Now it won't let me connect the wifi, whenever I turn on the wifi it jumps back to off.

I've tried several things.

1. I've done a factory reset. Didn't solve anything.
2. I've re-rooted it the same way I originally did. Nothing.
3. I've wiped the cache partition through the *#0011# menu. Still nothing.

I'm at a loss on how to solve the issue now.

Any suggestions?

GT-i9195
Android 4.4.2