incompatible Kernel Extension Configuration Data

My Internet sharing stop working on Tuesday and I looked it up and it says incompatible kernel extension configuration and I tried updating it like the Apple article said and it reset the memory to zero I didn't even update help me!!!!! so I still have 2.13 incompatible Kernel Extension Configuration Data installed by apple on 4/11/15 at 6:29 am how do i fix it where i can do wifi sharing again i use a ethernet cord